Methods and systems of securely storing documents on a mobile device

Abstract

A method of encrypting information using a computational tag may include, by a mobile electronic device, detecting a computational tag within a near field communication range of the mobile electronic device, identifying a document to be encrypted by the mobile electronic device, transmitting the document to the computational tag by the mobile electronic device, receiving, from the computational tag, an encrypted document, wherein the encrypted document comprises an encrypted version of the document that was to be encrypted, and storing the encrypted document in a memory of the mobile electronic device.

1 - 11 . (canceled) 
     
     
         12 . A method of controlling access to a document, comprising:
 by a mobile electronic device, receiving a request from a user to access an encrypted document;   by the mobile electronic device, detecting that a computational tag having decryption capability is in proximity to the mobile electronic device;   transmitting an encrypted document to the computational tag;   receiving a decrypted version of the encrypted document from the computational tag; and   in response to receiving the decrypted version of the encrypted document, presenting a decrypted version of the encrypted document to the user.   
     
     
         13 . The method of  claim 12 , wherein receiving a request from a user to access an encrypted document comprises receiving a selection of the encryption document from the user. 
     
     
         14 . The method of  claim 12 , wherein detecting that a computational tag having decryption capability is in proximity to the mobile electronic device comprises detecting the computational tag when the tag is in physical contact with the mobile electronic device. 
     
     
         15 . The method of  claim 12 , further comprising storing the decrypted version of the encrypted document by the mobile electronic device. 
     
     
         16 . The method of  claim 12 , wherein the computational tag encrypted the encrypted document. 
     
     
         17 . The method of  claim 12 , further comprising decrypting the encrypted document by the computational tag. 
     
     
         18 . The method of  claim 17 , wherein decrypting the encrypted document comprises performing one or more decryption algorithms on the encryption document to yield the decrypted version of the encrypted document. 
     
     
         19 . The method of  claim 18 , wherein the one or more decryption algorithms correspond to one or more encryption algorithms that were used to encrypt the encrypted document. 
     
     
         20 . A method of controlling access to a document, comprising:
 by a mobile electronic device, receiving a request from a user to access an encrypted document;   by the mobile electronic device, detecting that a computational tag having decryption capability is in proximity to the mobile electronic device;   transmitting an encrypted key associated with the encrypted document to the computational tag;   receiving, from the computational tag, a decrypted version of the encrypted key;   using the decrypted version of the encrypted key to decrypt the encrypted document; and   presenting the decrypted version of the encrypted document to the user.   
     
     
         21 . The method of  claim 20 , wherein the computational tag encrypts a key to generate the encrypted key. 
     
     
         22 . The method of  claim 20 , wherein detecting that a computational tag having decryption capability is in proximity to the mobile electronic device comprises detecting the computational tag when the tag is in physical contact with the mobile electronic device. 
     
     
         23 . The method of  claim 20 , further comprising storing the decrypted version of the encrypted document by the mobile electronic device. 
     
     
         24 . The method of  claim 20 , further comprising decrypting the encrypted key by the computational tag. 
     
     
         25 . The method of  claim 24 , wherein decrypting the encrypted document comprises performing one or more decryption algorithms on the encryption document to yield the decrypted version of the encrypted document. 
     
     
         26 . The method of  claim 25 , wherein the one or more decryption algorithms correspond to one or more encryption algorithms that were used to encrypt the encrypted document.