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Class Information
Number: 380/259
Name: Cryptography > Communication system using cryptography > Symmetric key cryptography
Description: Subject matter wherein the encryption and decryption keys are the same.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7421741 |
Securing digital content system and method |
Sep. 2, 2008 |
| 7409552 |
Method for securing communications between a terminal and an additional user equipment |
Aug. 5, 2008 |
| 7403622 |
Process for managing a symmetric key in a communication network and devices for the implementation of this process |
Jul. 22, 2008 |
| 7403620 |
Cyphering/decyphering performed by an integrated circuit |
Jul. 22, 2008 |
| 7400730 |
Cryptographic communication method in communication system |
Jul. 15, 2008 |
| 7401223 |
Authentication chip for authenticating an untrusted chip |
Jul. 15, 2008 |
| 7401356 |
Method and system for e-mail message transmission |
Jul. 15, 2008 |
| 7394900 |
Method and apparatus for preventing the interception of data being transmitted to a web site by a monitoring program |
Jul. 1, 2008 |
| 7389413 |
Method and system for filtering communication |
Jun. 17, 2008 |
| 7382880 |
Method and apparatus for initializing multiple security modules |
Jun. 3, 2008 |
| 7380138 |
Cryptographic method and apparatus |
May. 27, 2008 |
| 7379546 |
Method for XZ-elliptic curve cryptography |
May. 27, 2008 |
| 7376234 |
Portable keying device and method |
May. 20, 2008 |
| 7373501 |
System and method for on-line diagnostics |
May. 13, 2008 |
| 7370350 |
Method and apparatus for re-authenticating computing devices |
May. 6, 2008 |
| 7366903 |
Card activated cash dispensing automated banking machine system and method |
Apr. 29, 2008 |
| 7366917 |
System and method for accessing discrete data |
Apr. 29, 2008 |
| 7362863 |
DES hardware throughput for short operations |
Apr. 22, 2008 |
| 7363496 |
Authenticated ID-based cryptosystem with no key escrow |
Apr. 22, 2008 |
| 7359515 |
Method and apparatus for symmetric-key decryption |
Apr. 15, 2008 |
| 7353395 |
Authenticated ID-based cryptosystem with no key escrow |
Apr. 1, 2008 |
| 7349959 |
Method for creating and processing a soap message, and method, apparatus and program for processing information |
Mar. 25, 2008 |
| 7346586 |
Validation protocol and system |
Mar. 18, 2008 |
| 7334127 |
Key agreement and transport protocol |
Feb. 19, 2008 |
| 7327846 |
Secure cryptographic key exchange and verifiable digital signature |
Feb. 5, 2008 |
| 7316028 |
Method and system for transmitting information across a firewall |
Jan. 1, 2008 |
| 7305085 |
Encryption apparatus and method, and decryption apparatus and method based on block encryption |
Dec. 4, 2007 |
| 7298849 |
Method and apparatus for simultaneous encryption and decryption of publicly distributed media |
Nov. 20, 2007 |
| 7283629 |
Deriving keys used to securely process electronic messages |
Oct. 16, 2007 |
| 7281125 |
Securing sensitive configuration data remotely |
Oct. 9, 2007 |
| 7272858 |
Digital rights management (DRM) encryption and data-protection for content on a relatively simple device |
Sep. 18, 2007 |
| 7272231 |
Encrypting data for access by multiple users |
Sep. 18, 2007 |
| 7249108 |
Validation protocol and system |
Jul. 24, 2007 |
| 7246098 |
Consumable authentication protocol and system |
Jul. 17, 2007 |
| 7236593 |
Apparatus for encryption and decryption, capable of use in encryption and decryption of advanced encryption standard |
Jun. 26, 2007 |
| 7237110 |
Authentication system, authentication apparatus, authentication target apparatus, authentication method, method of being authenticated, program and information recording medium |
Jun. 26, 2007 |
| 7234063 |
Method and apparatus for generating pairwise cryptographic transforms based on group keys |
Jun. 19, 2007 |
| 7234058 |
Method and apparatus for generating pairwise cryptographic transforms based on group keys |
Jun. 19, 2007 |
| 7224795 |
Variable-length key cryptosystem |
May. 29, 2007 |
| 7225336 |
System and a method for giving run authorization to a program installed on a computer |
May. 29, 2007 |
| 7225331 |
System and method for securing data on private networks |
May. 29, 2007 |
| 7221762 |
Authenticated ID-based cryptosystem with no key escrow |
May. 22, 2007 |
| 7215773 |
Key validation scheme |
May. 8, 2007 |
| 7213149 |
Message authentication |
May. 1, 2007 |
| 7212631 |
Apparatus and method for performing KASUMI ciphering |
May. 1, 2007 |
| 7200226 |
Cipher block chaining decryption |
Apr. 3, 2007 |
| 7200232 |
Method and apparatus for symmetric-key decryption |
Apr. 3, 2007 |
| 7197642 |
Consumable authentication protocol and system |
Mar. 27, 2007 |
| 7191335 |
Method and apparatus for encrypted transmission |
Mar. 13, 2007 |
| 7184546 |
Method based on an algorithm capable of being graphically implemented to be used for the generation of filtering of data sequences and crytographic applications |
Feb. 27, 2007 |
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