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Class Information
Number: 380/261
Name: Cryptography > Communication system using cryptography > Symmetric key cryptography > Symmetric key synchronization > Including frame synchronization
Description: Subject matter wherein the synchronizing signal is determined by the starting point of a discrete data block input to a receiver.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7623723 |
Method for random point and patterned noise reduction in digital images |
Nov. 24, 2009 |
| 7532727 |
Hardware-based encryption/decryption employing dual ported key storage |
May. 12, 2009 |
| 7522727 |
Method and apparatus for providing authentication in a communication system |
Apr. 21, 2009 |
| 7505594 |
Discontinuous transmission (DTX) controller system and method |
Mar. 17, 2009 |
| 7474749 |
Method and apparatus for achieving crypto-syncronization in a packet data communication system |
Jan. 6, 2009 |
| 7434052 |
Method and device for producing an encrypted payload data stream and method and device for decrypting an encrypted payload data stream |
Oct. 7, 2008 |
| 7424116 |
Method and apparatus for providing authentication in a communication system |
Sep. 9, 2008 |
| 7369662 |
Maintaining end-to-end synchronization on a telecommunications connection |
May. 6, 2008 |
| 7366917 |
System and method for accessing discrete data |
Apr. 29, 2008 |
| 7362864 |
Framing of transmit encoded data and linear feedback shifting |
Apr. 22, 2008 |
| 7277546 |
Methods and apparatus for multi-level dynamic security system |
Oct. 2, 2007 |
| 7251729 |
Authentication method for establishing connection between devices |
Jul. 31, 2007 |
| 7245725 |
Dual processor framer |
Jul. 17, 2007 |
| 7188248 |
Recovering from de-synchronization attacks against watermarking and fingerprinting |
Mar. 6, 2007 |
| 7155011 |
Encryption method, decryption method, and recording and reproducing apparatus |
Dec. 26, 2006 |
| 7051203 |
Data watermarks created by using an uneven sampling period |
May. 23, 2006 |
| 7023992 |
Data multiplexing device, program distribution system, program transmission system, pay broadcast system, program transmission method, conditional access system, and data reception device |
Apr. 4, 2006 |
| 7006634 |
Hardware-based encryption/decryption employing dual ported key storage |
Feb. 28, 2006 |
| 7003114 |
Method and apparatus for achieving crypto-synchronization in a packet data communication system |
Feb. 21, 2006 |
| 6983022 |
Method and apparatus for modulating and demodulating data into a variable-length code and providing a sync signal to the train of codes |
Jan. 3, 2006 |
| 6952480 |
Self-synchronous data scrambler |
Oct. 4, 2005 |
| 6925183 |
Preventing shortened lifetimes of security keys in a wireless communications security system |
Aug. 2, 2005 |
| 6920557 |
System and method for wireless user interface for business machines |
Jul. 19, 2005 |
| 6879637 |
Method and apparatus for modulating and demodulating data into a variable length code and a providing medium for implementing the method |
Apr. 12, 2005 |
| 6873707 |
Hardware-based encryption/decryption employing cycle stealing |
Mar. 29, 2005 |
| 6778670 |
Method and apparatus for encryption and decryption |
Aug. 17, 2004 |
| 6654885 |
Method for authorization checking and configuration for carrying out the method |
Nov. 25, 2003 |
| 6560338 |
Limiting delays associated with the generation of encryption stream ciphers |
May. 6, 2003 |
| 6408077 |
Descrambling device of a security element and security element comprising such a device |
Jun. 18, 2002 |
| 6385319 |
Encoding circuit and method of detecting block code boundary and establishing synchronization between scrambler and descrambler |
May. 7, 2002 |
| 6215876 |
Apparatus for and method of detecting initialization vector errors and maintaining cryptographic synchronization without substantial increase in overhead |
Apr. 10, 2001 |
| 6005940 |
System for securely storing and reading encrypted data on a data medium using a transponder |
Dec. 21, 1999 |
| 5987139 |
Method for encryption of information |
Nov. 16, 1999 |
| 5987137 |
Method for the encryption of data transfer |
Nov. 16, 1999 |
| 5966450 |
Variable mask for encryption generated independently at communications stations |
Oct. 12, 1999 |
| 5881154 |
Data scramble transmission system |
Mar. 9, 1999 |
| 5838797 |
Secure communication by encryption/decryption of vector at PSK modulation/detection stage |
Nov. 17, 1998 |
| 5784462 |
Digital signal receiver capable of receiving data encrypted and transmitted in online processing |
Jul. 21, 1998 |
| 5778075 |
Methods and systems for mobile terminal assisted handover in an private radio communications network |
Jul. 7, 1998 |
| 5727064 |
Cryptographic system for wireless communications |
Mar. 10, 1998 |
| 5717762 |
WACS-type mobile communication with a unified frame format |
Feb. 10, 1998 |
| 5717761 |
Data transmission system capable of carrying out a data transmission with a high security |
Feb. 10, 1998 |
| 5710815 |
Encoder apparatus and decoder apparatus for a television signal having embedded viewer access control data |
Jan. 20, 1998 |
| 5689568 |
Medium access control for a mobile satellite system |
Nov. 18, 1997 |
| 5652796 |
Data encryption control system |
Jul. 29, 1997 |
| 5592554 |
Method for data security in a digital telecommunication system |
Jan. 7, 1997 |
| 5559890 |
Crypto equipment |
Sep. 24, 1996 |
| 5511124 |
Cryptographic equipment |
Apr. 23, 1996 |
| 5488663 |
Encoding methods for generating a digital signal containing modulated bit allocation information, and record carriers containing that signal |
Jan. 30, 1996 |
| 5488659 |
Encryption/decryption process and apparatus for a multichannel television system |
Jan. 30, 1996 |
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