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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 |
| 7623658 |
Method and system for implementing the A5/3 encryption algorithm for GSM and EDGE compliant handsets |
Nov. 24, 2009 |
| 7610486 |
Conditional access system and method |
Oct. 27, 2009 |
| 7606368 |
Method and apparatus for data encryption |
Oct. 20, 2009 |
| 7602918 |
Method for distributing security keys during hand-off in a wireless communication system |
Oct. 13, 2009 |
| 7602915 |
Communication system having plurality of nodes sharing a common cipher key, cipher key dispatching apparatus for use in the system, and anti-theft apparatus utilizing information derived from |
Oct. 13, 2009 |
| 7600134 |
Theft deterrence using trusted platform module authorization |
Oct. 6, 2009 |
| 7596225 |
Method for refreshing a pairwise master key |
Sep. 29, 2009 |
| 7596222 |
Encrypting data for access by multiple users |
Sep. 29, 2009 |
| 7580524 |
Method and apparatus for synchronizing the emitter and the receiver in an autocompensating quantum cryptography system |
Aug. 25, 2009 |
| 7574600 |
System and method for combining user and platform authentication in negotiated channel security protocols |
Aug. 11, 2009 |
| 7570764 |
Sequence number calculation and authentication in a communications system |
Aug. 4, 2009 |
| 7567672 |
Cryptographic communication system |
Jul. 28, 2009 |
| 7562223 |
Multifunction device with secure job release |
Jul. 14, 2009 |
| 7555121 |
Methods and apparatus for implementing a cryptography engine |
Jun. 30, 2009 |
| 7551740 |
Weighted secret sharing and reconstructing method |
Jun. 23, 2009 |
| 7552344 |
Hardware-based encryption/decryption employing dual ported key storage |
Jun. 23, 2009 |
| 7549061 |
Unauthorized contents detection system |
Jun. 16, 2009 |
| 7548887 |
Information-signal playback system, information-signal reading apparatus, information-signal processing apparatus, information-signal playback method, information-signal reading method and inf |
Jun. 16, 2009 |
| 7546468 |
Program update method and server |
Jun. 9, 2009 |
| 7542573 |
Providing apparatus, communication device, method, and program |
Jun. 2, 2009 |
| 7539312 |
Program update method and server |
May. 26, 2009 |
| 7532876 |
Communication system and associated method of performing mutual authentication |
May. 12, 2009 |
| RE40708 |
Dual encryption protocol for scalable secure group communication |
May. 5, 2009 |
| 7522727 |
Method and apparatus for providing authentication in a communication system |
Apr. 21, 2009 |
| 7515715 |
Information security for aeronautical surveillance systems |
Apr. 7, 2009 |
| 7516321 |
Method, system and device for enabling delegation of authority and access control methods based on delegated authority |
Apr. 7, 2009 |
| 7512972 |
Synchronizing for digital content access control |
Mar. 31, 2009 |
| 7509492 |
Distributed scalable cryptographic access control |
Mar. 24, 2009 |
| 7506370 |
Mobile security architecture |
Mar. 17, 2009 |
| 7502472 |
Encryption system and method for encrypting/decrypting sensitive data |
Mar. 10, 2009 |
| 7502463 |
Methods and apparatus for implementing a cryptography engine |
Mar. 10, 2009 |
| 7499542 |
Device and method for encrypting and decrypting a block of data |
Mar. 3, 2009 |
| 7496200 |
Architecture for manufacturing authenticatable gaming systems |
Feb. 24, 2009 |
| 7496202 |
Architecture for manufacturing authenticatable gaming systems |
Feb. 24, 2009 |
| 7493661 |
Secure transmission system |
Feb. 17, 2009 |
| 7490240 |
Electronically signing a document |
Feb. 10, 2009 |
| 7487352 |
Architecture for manufacturing authenticatable gaming systems |
Feb. 3, 2009 |
| 7487365 |
Saving and retrieving data based on symmetric key encryption |
Feb. 3, 2009 |
| 7480383 |
Apparatus and method for scrambling high-rate data |
Jan. 20, 2009 |
| 7471791 |
Method for countermeasure in an electronic component using a secret key algorithm |
Dec. 30, 2008 |
| 7471714 |
Random number sequence sharing system, random number sequence sharing apparatus, codec system, coding apparatus, decoding apparatus, random number sequence sharing method, coding method, decod |
Dec. 30, 2008 |
| 7472268 |
Privacy and security mechanism for presence systems with tuple spaces |
Dec. 30, 2008 |
| 7454020 |
System and method for encrypting data in pictorial data |
Nov. 18, 2008 |
| 7450720 |
Linear transformation for symmetric-key ciphers |
Nov. 11, 2008 |
| 7450719 |
Gigabit Ethernet-based passive optical network and data encryption method |
Nov. 11, 2008 |
| 7450260 |
Printer driver program and printer |
Nov. 11, 2008 |
| 7441116 |
Secure resource distribution through encrypted pointers |
Oct. 21, 2008 |
| 7440570 |
Method and apparatus for remote digital key generation |
Oct. 21, 2008 |
| 7433473 |
Data transmission method between a broadcasting center and a multimedia unit |
Oct. 7, 2008 |
| 7428638 |
Architecture for manufacturing authenticatable gaming systems |
Sep. 23, 2008 |
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