Securely managing access to a computer-implemented process using facial recognition and facial detection

Abstract

A system and method are provided for conditional delivery of electronic content such as images or video stream content over a communication network. In some embodiments, a condition for receiving such content is determined, for example a verification of a biometric fact as a face recognition or a finger print. The content will then be delivered conditioned on the satisfaction of the condition. In some embodiments, facial detection technology is used continually while sent content is being displayed to ensure that content is being viewed solely by the intended recipient. In some embodiments, the recipient's reaction to sent content is recorded on video and sent to the sender as a condition of viewing the sent content. In some embodiments, two or more users interact with one another in real time in a secure video conference.A computer-implemented method for securely managing access to a process includes: receiving a request to access the process; capturing, with a camera coupled to the device, a real-time image of the user's face; initiating a facial authentication of the recipient's face using the real-time image of the recipient's face; after receiving a confirmation that the real-time image of the recipient's face matches a prestored image of the recipient's face: providing access to the process; while providing access to the process: continuously detecting whether any faces are within the viewing range of the camera; when only one face is detected, continuing to provide access to the process; when (a) no faces are detected or (b) two or more faces are detected: automatically stopping access to the process; and displaying a notification that the recipient must facially reauthenticate in order to re-access the process.

What is claimed is: 
     
       1. A method for securely delivering content over a communications network from one person (sender) to a second person (recipient), the method comprising:
 the sender uploading content to a server that is in communication with the communications network;   using a first computing device equipped with a front-facing camera (sender device) that is in communication with the communications network:
 the sender authenticating his/her identity to the server using one or more biometric identification methods, said biometric identification methods comprising facial recognition methods; 
 the sender selecting a recipient to receive the content; 
 the sender selecting first and second conditions under which the recipient will be allowed to view the content; and 
 notifying the sender when the recipient has viewed the content; and 
   using a second computing device equipped with a front-facing camera (recipient device) that is in communication with the communications network:
 notifying the recipient of the availability of the content for viewing; 
 the recipient authenticating his/her identity to the server using one or more biometric identification methods, said biometric identification methods comprising facial recognition methods; 
 the recipient selecting the content for viewing; 
 notifying the recipient of the conditions for viewing the content that were selected by the sender; 
 the recipient communicating his/her agreement to said first condition, his/her rejection of said second condition, and his/her proposal for a third condition for viewing the content; 
   using the sender device, the sender communicating his/her agreement to the third condition; and   using the recipient device:
 the recipient placing his/her face within a viewing range of the front-facing camera of the recipient device; 
 while the recipient's face is within said viewing range, the recipient re-authenticating his/her identity to the server using one or more biometric identification methods, said biometric identification methods comprising facial recognition methods; 
 displaying the content on the recipient device; 
 while the content is being displayed on the recipient device:
 capturing a reaction video that includes video images of recipient's facial reaction with the recipient device's front-facing camera, 
 detecting whether the recipient's face remains within said viewing range, the recipient's face having been authenticated using said facial recognition methods, 
 detecting whether a face other than the recipient's face is within said viewing range, and 
 when the recipient's face is detected not to be within said viewing range or a face other than the recipient's face is detected within said viewing range:
 ceasing to display the content on the recipient device, and 
 notifying the recipient that the recipient must re-authenticate his/her identity to the server in order to resume viewing the content; 
 
 
 uploading said reaction video of the recipient's facial reaction to the server; and 
 after the content has been displayed on the recipient device:
 the sender placing his/her face within a viewing range of the front-facing camera of the recipient device, 
 while the sender's face is within said viewing range, the sender re-authenticating his/her identity to the server using one or more biometric identification methods, said biometric identification methods comprising facial recognition methods, 
 simultaneously displaying, on the sender device, both the sent content and the reaction video, such that said reaction video is time synchronized with the content so that the sender can see what in the content the recipient is reacting to at any given time with respect to said content, 
 while the content and the reaction video are simultaneously displayed on the sender device:
 capturing video images of sender's face with the sender device's front-facing camera, 
 detecting whether the sender's face remains within said viewing range of the front-facing camera of the recipient device, the sender's face having been authenticated using said facial recognition methods, 
 detecting whether a face other than the sender's face is in within said viewing range of the front-facing camera of the recipient device, and 
 when the sender's face is detected not to be within said viewing range of the front-facing camera of the recipient device or a face other than the sender's face is detected within said viewing range of the front-facing camera of the recipient device: 
  ceasing to display the reaction video on the sender device, and 
  notifying the sender that the sender must re-authenticate his/her identity to the server in order to resume viewing the reaction video; and 
 
 uploading said video images of sender's face to the server. 
 
   
     
     
       2. The method of  claim 1 , wherein the sender device is a wireless mobile device. 
     
     
       3. The method of  claim 1 , wherein the recipient device is a wireless mobile device. 
     
     
       4. The method of  claim 1 , wherein the sender device is a laptop or desktop computer. 
     
     
       5. The method of  claim 1 , wherein the recipient device is a laptop or desktop computer. 
     
     
       6. The method of  claim 1 , wherein detecting whether the recipient's face remains within said viewing range or whether a face other than the recipient's face is in within said viewing range is performed using a facial detection feature of an operating system of the recipient device. 
     
     
       7. The method of  claim 1 , wherein the content comprises a video recording. 
     
     
       8. The method of  claim 1 , wherein the content comprises one or more photographic images. 
     
     
       9. The method of  claim 1 , wherein the content comprises an electronic document shared by the sender with the recipient. 
     
     
       10. The method of  claim 1 , wherein the biometric identification methods used by the sender or the recipient to authenticate his/her identity to the server comprise fingerprint identification methods. 
     
     
       11. The method of  claim 1 , wherein the biometric identification methods used by the sender or the recipient to authenticate his/her identity to the server comprise a plurality of biometric identification methods. 
     
     
       12. The method of  claim 1 , wherein the conditions selected by the sender under which the recipient will be allowed to view the content comprise allowing the sender to view the reaction video. 
     
     
       13. The method of  claim 12 , wherein said conditions comprise allowing the sender to share the reaction video with third parties. 
     
     
       14. The method of  claim 12 , wherein said conditions comprise the recipient device being disabled from capturing images or screenshots of the content while the content is being displayed on the recipient device. 
     
     
       15. The method of  claim 1 , wherein the communications network comprises the Internet. 
     
     
       16. The method of  claim 1 , wherein the content is created by the sender using the sender device. 
     
     
       17. The method of  claim 1 , further comprising the sender using the sender device and the receiver using the recipient device to send textual and/or other messages to each other and displaying such messages to the other concurrently with the display of the content (in the case of messages sent to recipient) or the reaction video (in the case of messages sent to the sender). 
     
     
       18. A system for securely sharing content over a communications network comprising a server that is in communication with the communications network, and a plurality of computing devices (each a participant device), each such computing device equipped with a front-facing camera, each such computing device in communication with the communications network, each such computing device associated with an individual participant, wherein the server and the participant devices are configured to allow a sharing of content by participants with one another, such sharing of content comprising:
 a participant (sender) uploading content to the server;   using the participant device associated with the sender (sender device):
 the sender authenticating his/her identity to the server using one or more biometric identification methods, said biometric identification methods comprising facial recognition methods; 
 the sender selecting one or more other participants (recipients) to receive the content; 
 the sender selecting one or more conditions under which the recipient or recipients will be allowed to view the content; and 
 notifying the sender when each recipient has viewed the content; and 
   for each recipient, using the participant device or devices associated with such recipient (recipient device):
 notifying the recipient of the availability of the content for viewing; 
 the recipient authenticating his/her identity to the server using one or more biometric identification methods, said biometric identification methods comprising facial recognition methods; 
 the recipient selecting the content for viewing; 
 notifying the recipient of the conditions for viewing the content that were selected by the sender; 
 the recipient communicating his/her agreement to said conditions; 
 the recipient placing his/her face within a viewing range of the front-facing camera of the recipient device; 
 while the recipient's face is within said viewing range, the recipient re-authenticating his/her identity to the server using one or more biometric identification methods, said biometric identification methods comprising facial recognition methods; 
 displaying the content on the recipient device; 
 while the content is being displayed on the recipient device:
 capturing a reaction video that includes video images of recipient's facial reaction with the recipient device's front-facing camera; 
 detecting whether recipient's face remains within said viewing range, the recipient's face having been authenticated using said facial recognition methods; 
 detecting whether a face other than the recipient's face is in within said viewing range; and 
 when the recipient's face is detected not to be within said viewing range or a face other than the recipient's face is detected within said viewing range, ceasing to display the content on the recipient device, and notifying the recipient that the recipient must re-authenticate his/her identity to the server in order to resume viewing the content; 
 
   uploading said reaction video of the recipient's facial reaction to the server; and   after the content has been displayed on the recipient device, simultaneously displaying, on the sender device, both the sent content and the reaction video, such that said reaction video is time synchronized with the content so that the sender can see what in the content the recipient is reacting to at any given time with respect to said content.   
     
     
       19. The system of  claim 18 , such content comprising video images of a recipient's face captured by the relevant recipient device's front-facing camera during the time that the recipient was viewing content sent by a sender, such sharing of content comprising the recipient sharing such video images with the sender. 
     
     
       20. The system of  claim 18 , wherein such sharing of content comprises a participant using the relevant participant device to send textual and/or other messages to one or more other participants and displaying such messages to such other participants concurrently with the display of content on the relevant participant device. 
     
     
       21. The system of  claim 18 , wherein such sharing of content further comprises a participant using the relevant participant device to communicate to the server one or more ratings or other evaluations of content or of another participant, and the server storing such evaluations. 
     
     
       22. The system of  claim 21 , wherein the server uses such ratings or other evaluations to determine aggregate ratings or other evaluations of participants, and to communicate such aggregate ratings or other evaluations to participants. 
     
     
       23. The system of  claim 21 , wherein such ratings or other evaluations of participants comprises verification of identities of other participants. 
     
     
       24. The system of  claim 23 , wherein the server uses such ratings or other evaluations of participants to enhance said biometric identification methods. 
     
     
       25. The system of  claim 1 , said content comprising an electronic document, the method further comprising embedding a biometrically-authenticated signature into said electronic document as a signature of the recipient on said document. 
     
     
       26. The method of  claim 1 , wherein
 (a) the sender authenticating his/her identity to the server comprises sending an image of the sender's face to the server to perform facial recognition of the sender; or   (b) the recipient authenticating his/her identity to the server comprises sending an image of the recipient's face to the server to perform facial recognition of the recipient; or   (c) both (a) and (b).   
     
     
       27. The method of  claim 1 , wherein:
 (a) the sender authenticating his/her identity to the server comprises:
 comparing an image of the sender's face with a prestored image of the sender's face to perform facial recognition of the sender; and 
 when the image of the sender's face matches the prestored image of the sender's face, sending an indication to the server that the sender's identity is authentic; or 
   (b) the recipient authenticating his/her identity to the server comprises:
 comparing an image of the recipient's face with a prestored image of the recipient's face to perform facial recognition of the recipient; and 
 when the image of the recipient's face matches the prestored image of the recipient's face, sending an indication to the server that the recipient's identity is authentic; or 
   (c) both (a) and (b).   
     
     
       28. The system of  claim 18 , wherein:
 (a) the sender authenticating his/her identity to the server comprises:
 comparing an image of the sender's face with a prestored image of the sender's face to perform facial recognition of the sender; and 
 when the image of the sender's face matches the prestored image of the sender's face, sending an indication to the server that the sender's identity is authentic; or 
   (b) the recipient authenticating his/her identity to the server comprises:
 comparing an image of the recipient's face with a prestored image of the recipient's face to perform facial recognition of the recipient; and 
 when the image of the recipient's face matches the prestored image of the recipient's face, sending an indication to the server that the recipient's identity is authentic; or 
   (c) both (a) and (b).   
     
     
       29. The system of  claim 18 , wherein:
 (a) the sender authenticating his/her identity to the server comprises:
 comparing an image of the sender's face with a prestored image of the sender's face to perform facial recognition of the sender; and 
 when the image of the sender's face matches the prestored image of the sender's face, sending an indication to the server that the sender's identity is authentic; or 
   (b) the recipient authenticating his/her identity to the server comprises:
 comparing an image of the recipient's face with a prestored image of the recipient's face to perform facial recognition of the recipient; and 
 when the image of the recipient's face matches the prestored image of the recipient's face, sending an indication to the server that the recipient's identity is authentic; or 
   (c) both (a) and (b).   
     
     
       30. A system for securely delivering content over a communications network, comprising:
 a server in communication with the communications network;   a recipient device in communication with the server over the communications network, the recipient device associated with a recipient, the recipient device including or coupled to:
 a camera; and 
 a display screen, 
 wherein the server and the recipient device allow a secure delivery of the content, the server and the recipient device configured to:
 send a request, from the recipient device to the server, to view the content; 
 after the request is sent, capture, with the camera, a real-time image of the recipient's face while the recipient's face is within a viewing range of the camera; 
 compare the real-time image of the recipient's face with a prestored image of the recipient's face; 
 facially authenticate the recipient when the real-time image matches and the prestored image; 
 after the recipient is facially authenticated, display the content on the display screen; 
 while the content is displayed on the display screen:
 continuously detect whether only the recipient's face is within the viewing range of the camera; 
 when only the recipient's face is detected within the viewing range of the camera, continue to display the content on the display screen; 
 when (a) no faces are detected within the viewing range of the camera or (b) two or more faces are detected within the viewing range of the camera: 
  automatically stop the display of the content on the display screen; and 
  display a notification, on the display screen, that the recipient must facially reauthenticate in order to resume viewing the content; 
 
 
   wherein the camera is a recipient camera, and   the system further comprises:
 a processor-based sender device associated with a sender, the sender device in communication with the communications network: 
 the sender device configured to:
 select one or more conditions under which the recipient will be allowed to view the content; and 
 select the recipient to receive the content; and 
 
 the recipient device configured to:
 notify the recipient of the one or more conditions for viewing the content that were selected by the sender; and 
 prior to the display of the content on the display screen, 
 
 require the recipient to accept the one or more conditions in order to view the content; 
   wherein the one or more conditions for viewing the content include first and second conditions for viewing the content, and   the recipient device is further configured to:
 communicate an agreement by the recipient to the first condition, a rejection by the recipient to the second condition, and a proposal by the recipient for a third condition for viewing the content; 
 the sender device is further configured to:
 receive the agreement by the recipient to the first condition, the rejection by the recipient to the second condition, and the proposal by the recipient for the third condition for viewing the content; and 
 the recipient communicating his/her agreement to the third condition. 
 
   
     
     
       31. A computer-implemented method for securely delivering content over a communications network, comprising:
 with a processor-based recipient device in communication with a server over the communications network:
 sending a request to the server to view the content; 
 after sending the request, capturing, with a camera coupled to or on the recipient device, a real-time image of a recipient's face while the recipient's face is within a viewing range of the camera; 
 initiating a facial authentication of the recipient's face using the real-time image of the recipient's face; 
 receiving a confirmation that the real-time image of the recipient's face matches a prestored image of the recipient's face; 
 after receiving the confirmation, displaying the content on a display screen coupled to or on the recipient device; 
 while the content is being displayed on the display screen:
 continuously detecting whether only the recipient's face is within the viewing range of the camera; 
 when only the recipient's face is detected within the viewing range of the camera, continuing to display the content on the display screen; 
 when (a) no faces are detected within the viewing range of the camera or (b) two or more faces are detected within the viewing range of the camera:
 automatically stopping the display of the content on the display screen; and 
 displaying a notification, on the display screen, that the recipient must facially reauthenticate in order to resume viewing the content, 
 
 
   wherein the camera is a recipient camera, and   the method further comprises:
 with a processor-based sender device associated with a sender, the sender device in communication with the communications network:
 before sending the request, capturing, with a sender camera coupled to or on the sender device, a real-time image of a sender's face while the sender's face is within a viewing range of the sender camera; 
 initiating a facial authentication of the sender's face using the real-time image of the sender's face; 
 receiving a confirmation that the real-time image of the sender's face matches a prestored image of the sender's face; 
 after receiving the confirmation that the real-time image of the sender's face matches a prestored image of the sender's face:
 uploading the content from the sender device to the server; 
 selecting one or more conditions under which the recipient will be allowed to view the content; and 
 selecting the recipient to receive the content; and 
 
 with the recipient device:
 notifying the recipient of the one or more conditions for viewing the content that were selected by the sender; and 
 prior to displaying the content on the display screen, requiring the recipient to accept the one or more conditions in order to view the content, 
 
 
   wherein the one or more conditions for viewing the content include first and second conditions for viewing the content, and   the method further comprises:
 with the recipient device, the recipient communicating his/her agreement to the first condition, his/her rejection of the second condition, and his/her proposal for a third condition for viewing the content; 
 with the sender device:
 receiving the recipient's agreement to the first condition, his/her rejection of the second condition, and his/her proposal for the third condition for viewing the content; and 
 the recipient communicating his/her agreement to the third condition. 
 
   
     
     
       32. The method of  claim 31 , further comprising:
 while the content is being displayed on the display screen, capturing a reaction video, with the recipient camera, that includes video images of the recipient's facial reaction to the content, and   wherein the first, second, or third condition includes sharing the reaction video with the sender.   
     
     
       33. The method of  claim 32 , wherein:
 the display screen is a recipient display screen,   the real-time image of the sender's face is a first real-time image of the sender's face,   the sender device includes or is coupled to a sender display screen, and   the method further comprises:
 uploading the reaction video from the recipient device to the server; 
 after the reaction video is uploaded, with the sender device:
 capturing, with the sender camera, a second real-time image of the sender's face while the sender's face is within the viewing range of the sender camera; 
 initiating a facial reauthentication of the sender's face using the second real-time image of the sender's face; 
 receiving a confirmation that the second real-time image of the sender's face matches the prestored image of the sender's face; 
 after receiving the confirmation that the second real-time image of the sender's face matches the prestored image of the sender's face, simultaneously displaying, on the sender display screen, both the content and the reaction video, such that the reaction video is time-synchronized with the content so that the sender can see what in the content the recipient is reacting to at any given time with respect to the content; 
 while the content and the reaction video are being displayed simultaneously on the sender display screen:
 continuously detecting whether only the sender's face is within the viewing range of the sender camera; 
 when only the sender's face is detected within the viewing range of the sender camera, continuing to simultaneously display the content and the reaction video on the sender display screen; 
 when (a) no faces are detected to be within the viewing range of the sender camera or (b) two or more faces are detected to be within the viewing range of the sender camera: 
  automatically stopping a simultaneous display of the content and reaction video on the sender display screen; and 
  displaying a notification, on the sender display screen, that the sender must facially reauthenticate in order to resume viewing the content and the reaction video. 
 
 
   
     
     
       34. A computer-implemented method for securely delivering content over a communications network, comprising:
 with a processor-based recipient device in communication with a server over the communications network:
 sending a request to the server to view the content; 
 after sending the request, capturing, with a camera coupled to or on the recipient device, a real-time image of a recipient's face while the recipient's face is within a viewing range of the camera; 
 initiating a facial authentication of the recipient's face using the real-time image of the recipient's face; 
 receiving a confirmation that the real-time image of the recipient's face matches a prestored image of the recipient's face; 
 after receiving the confirmation, displaying the content on a display screen coupled to or on the recipient device; 
 while the content is being displayed on the display screen:
 continuously detecting whether only the recipient's face is within the viewing range of the camera; 
 when only the recipient's face is detected within the viewing range of the camera, continuing to display the content on the display screen; 
 when (a) no faces are detected within the viewing range of the camera or (b) two or more faces are detected within the viewing range of the camera:
 automatically stopping the display of the content on the display screen; and 
 displaying a notification, on the display screen, that the recipient must facially reauthenticate in order to resume viewing the content; 
 
 
   wherein the camera is a recipient camera, and   the method further comprises:
 with a processor-based sender device associated with a sender, the sender device in communication with the communications network:
 selecting one or more conditions under which the recipient will be allowed to view the content; and 
 selecting the recipient to receive the content; and with the recipient device: 
 notifying the recipient of the one or more conditions for viewing the content that were selected by the sender; and 
 prior to displaying the content on the display screen, requiring the recipient to accept the one or more conditions in order to view the content; 
 
   wherein the one or more conditions for viewing the content include first and second conditions for viewing the content, and   the method further comprises:
 with the recipient device, the recipient communicating his/her agreement to the first condition, his/her rejection of the second condition, and his/her proposal for a third condition for viewing the content; 
 with the sender device:
 receiving the recipient's agreement to the first condition, his/her rejection of the second condition, and his/her proposal for the third condition for viewing the content; and 
 the recipient communicating his/her agreement to the third condition. 
 
   
     
     
       35. The method of  claim 34 , wherein the content comprises a video stream, a video recording, a digital image, a digital file, or an electronic document. 
     
     
       36. The method of  claim 34 , wherein the step of detecting whether only the recipient's face is within the viewing range of the camera is performed using a facial detection feature of an operating system of the recipient device. 
     
     
       37. The method of  claim 34 , further comprising:
 prior to displaying the content on the display screen, performing a fingerprint scan and/or a retinal scan of the recipient to biometrically authenticate the recipient.   
     
     
       38. The method of  claim 34 , wherein the one or more conditions comprise the recipient device being disabled from capturing images or screenshots of the content while the content is being displayed on the display screen. 
     
     
       39. The method of  claim 34 , wherein the step of automatically stopping the display of the content on the display screen includes blurring the display of the content on the display screen. 
     
     
       40. The method of  claim 34 , further comprising:
 while the content is being displayed on the display screen, capturing a reaction video, with the recipient camera, that includes video images of the recipient's facial reaction to the content,   wherein the one or more conditions include sharing the reaction video with the sender.   
     
     
       41. The method of  claim 40 , further comprising the sender using the sender device and the receiver using the recipient device to send textual and/or other messages to each other and displaying such messages to the other concurrently with the display of the content, in the case of messages sent to recipient or the simultaneous display of the content and the reaction video, in the case of messages sent to the sender. 
     
     
       42. The method of  claim 34 , further comprising:
 while the content is being displayed on the display screen, capturing a reaction video, with the recipient camera, that includes video images of the recipient's facial reaction to the content, and   wherein the first, second, or third condition includes sharing the reaction video with the sender.   
     
     
       43. The method of  claim 42 , further comprising the sender using the sender device and the receiver using the recipient device to send textual and/or other messages to each other and displaying such messages to the other concurrently with the display of the content, in the case of messages sent to recipient or the simultaneous display of the content and the reaction video, in the case of messages sent to the sender. 
     
     
       44. The method of  claim 34 , wherein the content comprises an electronic document, the method further comprising:
 with the processor-based recipient device in communication with the server:   allowing the recipient to electronically sign the electronic document.   
     
     
       45. The method of  claim 31 , wherein the content comprises a video stream, a video recording, a digital image, a digital file, or an electronic document. 
     
     
       46. The method of  claim 31 , wherein the step of detecting whether only the recipient's face is within the viewing range of the camera is performed using a facial detection feature of an operating system of the recipient device. 
     
     
       47. The method of  claim 31 , further comprising:
 prior to displaying the content on the display screen, performing a fingerprint scan and/or a retinal scan of the recipient to biometrically authenticate the recipient.   
     
     
       48. The method of  claim 31 , wherein the one or more conditions comprise the recipient device being disabled from capturing images or screenshots of the content while the content is being displayed on the display screen. 
     
     
       49. The method of  claim 31 , wherein the step of automatically stopping the display of the content on the display screen includes blurring the display of the content on the display screen. 
     
     
       50. The method of  claim 31 , further comprising:
 while the content is being displayed on the display screen, capturing a reaction video, with the recipient camera, that includes video images of the recipient's facial reaction to the content,   wherein the one or more conditions include sharing the reaction video with the sender.   
     
     
       51. The method of  claim 50 , wherein:
 the display screen is a recipient display screen,   the real-time image of the sender's face is a first real-time image of the sender's face,   the sender device includes or is coupled to a sender display screen, and   the method further comprises:
 uploading the reaction video from the recipient device to the server; 
 after the content has been displayed on the recipient device, with the sender device:
 capturing, with the sender camera, a second real-time image of the sender's face while the sender's face is within the viewing range of the sender camera; 
 initiating a facial reauthentication of the sender's face using the second real-time image of the sender's face; 
 receiving a confirmation that the second real-time image of the sender's face matches the prestored image of the sender's face; 
 after receiving the confirmation that the second real-time image of the sender's face matches the prestored image of the sender's face, simultaneously displaying, on the sender display screen, both the content and the reaction video, such that the reaction video is time-synchronized with the content so that the sender can see what in the content the recipient is reacting to at any given time with respect to the content; 
 while the content and the reaction video are being displayed simultaneously on the sender display screen:
 continuously detecting whether only the sender's face is within the viewing range of the sender camera; 
 when only the sender's face is detected within the viewing range of the sender camera, continuing to display simultaneously the content and the reaction video on the sender display screen; 
 when (a) no faces are detected to be within the viewing range of the sender camera or (b) two or more faces are detected to be within the viewing range of the sender camera: 
  automatically stopping a simultaneous display of the content and the reaction video on the sender display screen; and 
  displaying a notification, on the sender display screen, that the sender must facially reauthenticate in order to resume viewing the content and the reaction video. 
 
 
   
     
     
       52. The method of  claim 31 , further comprising the sender using the sender device and the receiver using the recipient device to send textual and/or other messages to each other and displaying such messages to the other concurrently with the display of the content, in the case of messages sent to recipient or the simultaneous display of the content and the reaction video, in the case of messages sent to the sender. 
     
     
       53. The method of  claim 31 , wherein the content comprises an electronic document, the method further comprising:
 with the processor-based recipient device in communication with the server:   allowing the recipient to electronically sign the electronic document.   
     
     
       54. The system of  claim 30 , wherein the content comprises a video stream, a video recording, a digital image, a digital file, or an electronic document. 
     
     
       55. The system of  claim 30 , wherein the detect whether only the recipient's face is within the viewing range of the camera is performed using a facial detection feature of an operating system of the recipient device. 
     
     
       56. The system of  claim 30 , the server and the recipient device further configured to: prior to the display the content on the display screen, perform a fingerprint scan and/or a retinal scan of the recipient to biometrically authenticate the recipient. 
     
     
       57. The system of  claim 30 , wherein the one or more conditions comprise the recipient device being disabled from capturing images or screenshots of the content while the content is being displayed on the display screen. 
     
     
       58. The system of  claim 30 , wherein the automatically stop the display of the content on the display screen includes blur the display of the content on the display screen. 
     
     
       59. The system of  claim 30 , wherein:
 the sender device further configured to:
 before the send the request, capture, with a sender camera coupled to or on the sender device, a real-time image of a sender's face while the sender's face is within a viewing range of the sender camera; 
 initiate a facial authentication of the sender's face using the real-time image of the sender's face; 
 receive a confirmation that the real-time image of the sender's face matches a prestored image of the sender's face; 
 after the receive the confirmation that the real-time image of the sender's face matches a prestored image of the sender's face:
 upload the content from the sender device to the server; 
 select one or more conditions under which the recipient will be allowed to view the content; and 
 select the recipient to receive the content. 
 
   
     
     
       60. The system of  claim 59 , the server and the recipient device further configured to:
 while the content is being displayed on the display screen, capture a reaction video, with the recipient camera, that includes video images of the recipient's facial reaction to the content,   wherein the one or more conditions include sharing the reaction video with the sender.   
     
     
       61. The system of  claim 60 , wherein:
 the display screen is a recipient display screen,   the real-time image of the sender's face is a first real-time image of the sender's face,   the sender device includes or is coupled to a sender display screen;   the server and the recipient device further configured to:
 upload the reaction video from the recipient device to the server; 
   the sender device further configured to:
 after the content has been displayed on the recipient device: 
 capture, with the sender camera, a second real-time image of the sender's face while the sender's face is within the viewing range of the sender camera; 
 initiate a facial reauthentication of the sender's face using the second real-time image of the sender's face; 
 receive a confirmation that the second real-time image of the sender's face matches the prestored image of the sender's face; 
 after the receive a confirmation that the second real-time image of the sender's face matches the prestored image of the sender's face, simultaneously display, on the sender display screen, both the content and the reaction video, such that the reaction video is time-synchronized with the content so that the sender can see what in the content the recipient is reacting to at any given time with respect to the content; 
 while the content and the reaction video are being displayed simultaneously on the sender display screen:
 continuously detect whether only the sender's face is within the viewing range of the sender camera; 
 when only the sender's face is detected within the viewing range of the sender camera, continue to display simultaneously the content and the reaction video on the sender display screen; 
 when (a) no faces are detected to be within the viewing range of the sender camera or (b) two or more faces are detected to be within the viewing range of the sender camera:
 automatically stop a simultaneous display of the content and the reaction video on the sender display screen; and 
 display a notification, on the sender display screen, that the sender must facially reauthenticate in order to resume viewing the content and the reaction video. 
 
 
   
     
     
       62. The system of  claim 59 , the sender device and the recipient device further configured to send textual and/or other messages to each other and display such messages to the other concurrently with the display of the content, in the case of messages sent to recipient or the simultaneous display of the content and the reaction video, in the case of messages sent to the sender. 
     
     
       63. The system of  claim 30 , the recipient device further configured to:
 while the content is being displayed on the display screen, capture a reaction video, with the recipient camera, that includes video images of the recipient's facial reaction to the content, and   wherein the first, second, or third condition includes sharing the reaction video with the sender.   
     
     
       64. The system of  claim 63 , wherein:
 the display screen is a recipient display screen,   the real-time image of the sender's face is a first real-time image of the sender's face,   the sender device includes or is coupled to a sender display screen;   the server and the recipient device further configured to:
 upload the reaction video from the recipient device to the server; 
   the sender device further configured to:
 after the reaction video is uploaded: 
 capture, with the sender camera, a second real-time image of the sender's face while the sender's face is within the viewing range of the sender camera; 
 initiate a facial reauthentication of the sender's face using the second real-time image of the sender's face; 
 receive a confirmation that the second real-time image of the sender's face matches the prestored image of the sender's face; 
 after the receive a confirmation that the second real-time image of the sender's face matches the prestored image of the sender's face, simultaneously display, on the sender display screen, both the content and the reaction video, such that the reaction video is time-synchronized with the content so that the sender can see what in the content the recipient is reacting to at any given time with respect to the content; 
 while the content and the reaction video are being displayed simultaneously on the sender display screen:
 continuously detect whether only the sender's face is within the viewing range of the sender camera; 
 when only the sender's face is detected within the viewing range of the sender camera, continue to simultaneously display the content and the reaction video on the sender display screen; 
 when (a) no faces are detected to be within the viewing range of the sender camera or (b) two or more faces are detected to be within the viewing range of the sender camera:
 automatically stop a simultaneous display of the content and reaction video on the sender display screen; and 
 display a notification, on the sender display screen, that the sender must facially reauthenticate in order to resume viewing the content and the reaction video. 
 
 
   
     
     
       65. The system of  claim 59 , wherein the one or more conditions includes disabling the recipient device from capturing images or screenshots of the content while the content is displayed on the recipient display. 
     
     
       66. The system of  claim 30 , the server and the recipient device further configured to:
 while the content is being displayed on the display screen, capture a reaction video, with the recipient camera, that includes video images of the recipient's facial reaction to the content,   wherein the one or more conditions include sharing the reaction video with the sender.   
     
     
       67. The system of  claim 30 , wherein the content comprises an electronic document; and
 the recipient device in communication with the server is further configured to allow the recipient to electronically sign the electronic document.