Inventor
STORNETTA JR WAKEFIELD S
US4 patents
Patents
4 patentsUSRE34954EMay 30, 1995
Method for secure time-stamping of digital documents
BELL COMMUNICATIONS RES264 citations97
US5373561ADec 13, 1994
Method of extending the validity of a cryptographic certificate
BELL COMMUNICATIONS RES343 citations97
US5136646AAug 4, 1992
Digital document time-stamping with catenate certificate
BELL COMMUNICATIONS RES477 citations97
US5136647AAug 4, 1992
Method for secure time-stamping of digital documents
BELL COMMUNICATIONS RES546 citations97