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Class Information
Number: 380/36
Name: Cryptography > Communication system using cryptography > Time segment interchange
Description: Subject matter which divides the message signal into time interval segments the order of which are interchanged.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7298840 |
Method and system for data integrity protection |
Nov. 20, 2007 |
| 7260217 |
Speculative execution for data ciphering operations |
Aug. 21, 2007 |
| 7246235 |
Time varying presentation of items based on a key hash |
Jul. 17, 2007 |
| 7209556 |
Encryption apparatus and method, and decryption apparatus and method based on block encryption |
Apr. 24, 2007 |
| 7155011 |
Encryption method, decryption method, and recording and reproducing apparatus |
Dec. 26, 2006 |
| 7142671 |
Methods and apparatus for implementing a cryptography engine |
Nov. 28, 2006 |
| 7124442 |
System and method for insertion and retrieval of microthreads in transmitted data |
Oct. 17, 2006 |
| 7076060 |
Cipher |
Jul. 11, 2006 |
| 7062651 |
Network printer registration protocol |
Jun. 13, 2006 |
| 7058178 |
Synchronous stream cipher |
Jun. 6, 2006 |
| 7051203 |
Data watermarks created by using an uneven sampling period |
May. 23, 2006 |
| 6970561 |
Encryption and decryption with endurance to cryptanalysis |
Nov. 29, 2005 |
| 6873707 |
Hardware-based encryption/decryption employing cycle stealing |
Mar. 29, 2005 |
| 6393126 |
System and methods for generating trusted and authenticatable time stamps for electronic documents |
May. 21, 2002 |
| 6320965 |
Secure watermark method and apparatus for digital signals |
Nov. 20, 2001 |
| 6249583 |
On-line signal processing method |
Jun. 19, 2001 |
| 6182214 |
Exchanging a secret over an unreliable network |
Jan. 30, 2001 |
| 6072873 |
Digital video broadcasting |
Jun. 6, 2000 |
| 6032258 |
Apparatus and methods for transmission security in a computer network |
Feb. 29, 2000 |
| 5999566 |
Method and apparatus for providing error-tolerant communication of information |
Dec. 7, 1999 |
| 5933431 |
Frame-based modulus interleaver |
Aug. 3, 1999 |
| 5892899 |
Tamper resistant methods and apparatus |
Apr. 6, 1999 |
| 5892775 |
Method and apparatus for providing error-tolerant storage of information |
Apr. 6, 1999 |
| 5818934 |
Method and apparatus for providing a cryptographically secure interface between the decryption engine and the system decoder of a digital television receiver |
Oct. 6, 1998 |
| 5535275 |
Apparatus and method for producing scrambled digital video signals |
Jul. 9, 1996 |
| 5335275 |
Television scrambler |
Aug. 2, 1994 |
| 5303302 |
Network packet receiver with buffer logic for reassembling interleaved data packets |
Apr. 12, 1994 |
| 5253296 |
System for resisting interception of information |
Oct. 12, 1993 |
| 5208857 |
Method and device for scrambling-unscrambling digital image data |
May. 4, 1993 |
| 5206906 |
Video scrambling system |
Apr. 27, 1993 |
| 5161191 |
Encryption system for time division multiplexed networks |
Nov. 3, 1992 |
| 4965827 |
Authenticator |
Oct. 23, 1990 |
| 4937867 |
Variable time inversion algorithm controlled system for multi-level speech security |
Jun. 26, 1990 |
| 4905278 |
Scrambling of analogue electrical signals |
Feb. 27, 1990 |
| 4852166 |
Analogue scrambling system with dynamic band permutation |
Jul. 25, 1989 |
| 4827513 |
Communications system |
May. 2, 1989 |
| 4811394 |
Variable starting state scrambling circuit |
Mar. 7, 1989 |
| 4773092 |
Speech scramblers |
Sep. 20, 1988 |
| 4771455 |
Scrambling apparatus |
Sep. 13, 1988 |
| 4750205 |
Frequency or time domain speech scrambling technique and system which does not require any frame synchronization |
Jun. 7, 1988 |
| 4731839 |
Method for coding and de-coding audio and video information |
Mar. 15, 1988 |
| 4683586 |
Scrambling system for an audio frequency signal |
Jul. 28, 1987 |
| 4600941 |
Scrambling system for audio frequency signals |
Jul. 15, 1986 |
| 4598169 |
System for detecting a marker signal inserted in an information signal |
Jul. 1, 1986 |
| 4551580 |
Time-frequency scrambler |
Nov. 5, 1985 |
| 4547802 |
TV Scrambler/descrambler using serial memories |
Oct. 15, 1985 |
| 4459611 |
Image conversion system |
Jul. 10, 1984 |
| 4443660 |
System and method for encrypting a voice signal |
Apr. 17, 1984 |
| 4433211 |
Privacy communication system employing time/frequency transformation |
Feb. 21, 1984 |
| 4405942 |
Method and system for secure transmission and reception of video information, particularly for television |
Sep. 20, 1983 |
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