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| 6816595 | Mini time key creation method and system
| March 19, 1999 |
| 6813357 | Exclusive key sharing method
| January 1, 0001 |
| 6804354 | Cryptographic isolator using multiplication
| December 2, 1999 |
| 6792111 | Cryptation system for packet switching networks based on digital chaotic models
| October 12, 1999 |
| 6763464 | Self-protecting documents
| July 18, 2002 |
| 6760441 | Generating a key hieararchy for use in an isolated execution environment
| March 31, 2000 |
| 6735313 | Cryptographic method and apparatus for restricting access to transmitted programming content using hash functions and program identifiers
| May 7, 1999 |
| 6724894 | Cryptographic device having reduced vulnerability to side-channel attack and method of operating same
| November 5, 1999 |
| 6687375 | Generating user-dependent keys and random numbers
| June 2, 1999 |
| 6640303 | System and method for encryption using transparent keys
| September 22, 2000 |
| 6622050 | Variable encryption scheme for data transfer between medical devices and related data management systems
| March 30, 2001 |
| 6560581 | System and method for secure electronic commerce transaction
| June 8, 1998 |
| 6519700 | Self-protecting documents
| October 23, 1998 |
| 6453296 | Electronic credit system and communication apparatus
| January 31, 1997 |
| 6446051 | Document transfer systems
| February 11, 1999 |
| 6445797 | Method and system for performing secure electronic digital streaming
| December 16, 1998 |
| 6434238 | Multi-purpose transaction card system
| August 11, 1997 |
| 6363149 | Method and apparatus for accessing stored digital programs
| October 1, 1999 |
| 6356637 | Field programmable gate arrays
| September 18, 1998 |
| 6307940 | Communication network for encrypting/deciphering communication text while updating encryption key, a communication terminal thereof, and a communication method thereof
| June 25, 1998 |
| 6298153 | Digital signature method and information communication system and apparatus using such method
| January 13, 1999 |
| 6297891 | Method & system for electronic document certification
| March 1, 1999 |
| 6285761 | Method for generating pseudo-random numbers
| March 4, 1998 |
| 6282290 | High speed modular exponentiator
| March 28, 1997 |
| 6256391 | Enciphering apparatus and method, deciphering apparatus and method as well as information processing apparatus and method
| April 14, 1998 |
| 6246769 | Authorized user verification by sequential pattern recognition and access code acquisition
| February 24, 2000 |
| 6237097 | Robust efficient distributed RSA-key generation
| May 21, 1999 |
| 6212281 | Digital signature protocol
| October 10, 1997 |
| 6185307 | Cryptography security for remote dispenser transactions
| January 13, 1998 |
| 6157722 | Encryption key management system and method
| March 23, 1998 |
| 6154542 | Method and apparatus for simultaneously encrypting and compressing data
| December 17, 1997 |
| 6144744 | Method and apparatus for the secure transfer of objects between cryptographic processors
| June 30, 1997 |
| 6118869 | System and method for PLD bitstream encryption
| March 11, 1998 |
| 6111952 | Asymmetrical cryptographic communication method and portable object therefore
| September 25, 1997 |
| 6081601 | Method of implementing connection security in a wireless network
| January 27, 1998 |
| 6069957 | Method and apparatus for providing hierarchical key system in restricted-access television system
| March 7, 1997 |
| 6067622 | Software security system using remove function to restrict unauthorized duplicating and installation of an application program
| January 2, 1996 |
| 6023506 | Data encryption control apparatus and method
| October 28, 1996 |
| 6016350 | Encryption apparatus for enabling encryption and non-encryption terminals to be connected on the same network
| May 9, 1997 |
| 6011849 | Encryption-based selection system for steganography
| August 28, 1997 |
| 6002769 | Method and system for performing secure electronic messaging
| September 4, 1997 |
| 5982896 | System and method of verifying cryptographic postage evidencing using a fixed key set
| December 23, 1996 |
| 5982506 | Method and system for electronic document certification
| September 10, 1996 |
| 5936541 | Method for securing information relevant to a transaction
| June 10, 1997 |
| 5923754 | Copy protection for recorded media
| May 2, 1997 |
| 5920630 | Method of public key cryptography that includes key escrow
| February 25, 1997 |
| 5852665 | Internationally regulated system for one to one cryptographic communications with national sovereignty without key escrow
| July 18, 1996 |
| 5850443 | Key management system for mixed-trust environments
| August 15, 1996 |
| 5796839 | Encryption method, encryption apparatus, recording method, decoding method, decoding apparatus and recording medium
| October 15, 1996 |
| 5793302 | Method for securing information relevant to a transaction
| November 12, 1996 |
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