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Class Information
Number: 380/252
Name: Cryptography > Electric signal masking
Description: Subject matter wherein the characteristics of an information bearing electric signal are obscured by the addition of an extraneous interfering signal.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7620253 |
Steganographic systems and methods |
Nov. 17, 2009 |
| 7613296 |
M6 block cipher system and method for encoding content and authenticating a device |
Nov. 3, 2009 |
| 7606388 |
Contents border detection apparatus, monitoring method, and contents location detection method and program and storage medium therefor |
Oct. 20, 2009 |
| 7599927 |
Method for searching content particularly for extracts common to two computer files |
Oct. 6, 2009 |
| 7587044 |
Differential power analysis method and apparatus |
Sep. 8, 2009 |
| 7555432 |
Audio steganography method and apparatus using cepstrum modification |
Jun. 30, 2009 |
| 7546466 |
Decoding of watermarked information signals |
Jun. 9, 2009 |
| 7532725 |
Systems and methods for permitting open access to data objects and for securing data within the data objects |
May. 12, 2009 |
| 7529941 |
System and method of retrieving a watermark within a signal |
May. 5, 2009 |
| 7526090 |
Secured radio communications method |
Apr. 28, 2009 |
| 7508944 |
Using classification techniques in digital watermarking |
Mar. 24, 2009 |
| 7489797 |
Method and apparatus for fragile watermarking |
Feb. 10, 2009 |
| 7487356 |
Digital watermarking system using scrambling method |
Feb. 3, 2009 |
| 7482947 |
Camouflaging business-activity information in a telemetry signal through randomization |
Jan. 27, 2009 |
| 7482946 |
Method and apparatus for camouflaging business-activity information in a telemetry signal |
Jan. 27, 2009 |
| 7451319 |
System and method of watermarking a signal |
Nov. 11, 2008 |
| 7451318 |
System and method of watermarking a signal |
Nov. 11, 2008 |
| 7372965 |
Electric circuit management method and device |
May. 13, 2008 |
| 7370363 |
Electronic information embedding method and extracting method, electronic information burying apparatus and extracting apparatus, and programs therefor |
May. 6, 2008 |
| 7359513 |
Quantum cryptography protocol |
Apr. 15, 2008 |
| 7356142 |
Secure compact disk and player |
Apr. 8, 2008 |
| 7346165 |
Apparatus and method for generating scrambling code in mobile communication system |
Mar. 18, 2008 |
| 7333965 |
Classifying text in a code editor using multiple classifiers |
Feb. 19, 2008 |
| 7324646 |
Method and apparatus for film anti-piracy |
Jan. 29, 2008 |
| 7305089 |
Picture taking apparatus and method of controlling same |
Dec. 4, 2007 |
| 7290141 |
Authentication of remotely originating network messages |
Oct. 30, 2007 |
| 7277871 |
Digital watermark system |
Oct. 2, 2007 |
| 7251327 |
Data transmission apparatus, data transmission method, and data recording medium |
Jul. 31, 2007 |
| 7239707 |
Staggered pulse acquisition method and apparatus |
Jul. 3, 2007 |
| 7231271 |
Steganographic method for covert audio communications |
Jun. 12, 2007 |
| 7190792 |
Systems and methods for retrofitting electronic appliances to accept different content formats |
Mar. 13, 2007 |
| 7181022 |
Audio watermarking to convey auxiliary information, and media embodying same |
Feb. 20, 2007 |
| 7177429 |
System and methods for permitting open access to data objects and for securing data within the data objects |
Feb. 13, 2007 |
| 7177430 |
Digital entroping for digital audio reproductions |
Feb. 13, 2007 |
| 7146503 |
System and method of watermarking signal |
Dec. 5, 2006 |
| 7142670 |
Space-efficient, side-channel attack resistant table lookups |
Nov. 28, 2006 |
| 7140037 |
Signal reproducing apparatus and method, signal recording apparatus and method, signal receiver, and information processing method |
Nov. 21, 2006 |
| 7131007 |
System and method of retrieving a watermark within a signal |
Oct. 31, 2006 |
| 7127620 |
Power analysis resistant coding device |
Oct. 24, 2006 |
| 7124442 |
System and method for insertion and retrieval of microthreads in transmitted data |
Oct. 17, 2006 |
| 7046808 |
Method and apparatus for detecting processing stages applied to a signal |
May. 16, 2006 |
| 7043019 |
Copy protection for digital motion picture image data |
May. 9, 2006 |
| 7043022 |
Packet order determining method and apparatus |
May. 9, 2006 |
| 7039614 |
Method for simulcrypting scrambled data to a plurality of conditional access devices |
May. 2, 2006 |
| 7024175 |
System for masking microphonic voice signals in wired telecommunications equipment |
Apr. 4, 2006 |
| 7020281 |
Timing attack resistant cryptographic system |
Mar. 28, 2006 |
| 7003118 |
High performance IPSEC hardware accelerator for packet classification |
Feb. 21, 2006 |
| 6996237 |
Apparatus and methods for including codes in audio signals |
Feb. 7, 2006 |
| 6993133 |
Data recording and reproduction apparatus |
Jan. 31, 2006 |
| 6983051 |
Methods for audio watermarking and decoding |
Jan. 3, 2006 |
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