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Class Information
Number: 380/205
Name: Cryptography > Video cryptography > Video electric signal masking
Description: Subject matter wherein the characteristics of an information bearing video electric signal are obscured by the addition of an extraneous interfering signal.

Sub-classes under this class:

Class Number Class Name Patents
380/208 Including filter for removing masking signal 51
380/207 Including locally generated masking signal 50
380/206 Masking of synchronization signal 53
380/209 Masking signal selectively addressed 55

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8638944 Security countermeasures for power analysis attacks Jan. 28, 2014
8601601 Method and apparatus for controlling access restrictions for media playback Dec. 3, 2013
8571213 Security method for preventing the unauthorized use of multimedia contents Oct. 29, 2013
8553877 Substitution table masking for cryptographic processes Oct. 8, 2013
8553881 Composite masking system and method for improving invisibility of high-definition video watermarking Oct. 8, 2013
8526611 Utilizing data reduction in steganographic and cryptographic systems Sep. 3, 2013
8515065 Video input device and video display system Aug. 20, 2013
8488781 Method for implementing symmetric key encryption algorithm against power analysis attacks Jul. 16, 2013
8474059 Apparatus and method for embedding and extracting information in analog signals using distributed signal features and replica modulation Jun. 25, 2013
8467525 Steganographic method and device Jun. 18, 2013
8433067 Device, method, and program for image encryption/decryption Apr. 30, 2013
8405881 Image processing device with an additional image overlaying function Mar. 26, 2013
8391483 Storage of digital data Mar. 5, 2013
8335014 Image forming apparatus, control method, and program for copy-forgery-inhibited dot pattern calibration Dec. 18, 2012
8325917 Reproducing device, recording device, recording medium, data processing method, data processing program, data recording method, data recording program, and integrated circuit Dec. 4, 2012
8325928 Security countermeasure for power analysis attacks Dec. 4, 2012
8327449 Information processing apparatus, information recording medium, information processing method, and computer program Dec. 4, 2012
8315385 Digital entroping for digital audio reproductions Nov. 20, 2012
8306222 Removable secure portable electronic entity including means for authorizing deferred retransmission Nov. 6, 2012
8265273 Encryption device using mask value to convert plain text into encrypted text Sep. 11, 2012
8265276 Method for combining transfer functions and predetermined key creation Sep. 11, 2012
8250665 Digital Broadcasting system and method of processing data in digital broadcasting system Aug. 21, 2012
8204222 Steganographic encoding and decoding of auxiliary codes in media signals Jun. 19, 2012
8204929 Hiding sensitive information Jun. 19, 2012
8199913 Object authentication using embossed hidden images Jun. 12, 2012
8189858 Digital watermarking with spatiotemporal masking May. 29, 2012
8181022 Method and apparatus for controlling access restrictions for media playback May. 15, 2012
8160249 Utilizing data reduction in steganographic and cryptographic system Apr. 17, 2012
8115775 System, method, and computer program product for encoding information in texture maps to enhance texturing Feb. 14, 2012
8085935 Embedding and extraction of information from an embedded content using replica modulation Dec. 27, 2011
8064457 System and method for filtering a data packet using a common filter Nov. 22, 2011
8055903 Signal watermarking in the presence of encryption Nov. 8, 2011
8054969 Transmission of a digital message interspersed throughout a compressed information signal Nov. 8, 2011
8000474 Client-side protection of broadcast or multicast content for non-real-time playback Aug. 16, 2011
RE42627 Encoding and decoding of information in audio signals Aug. 16, 2011
7961880 Methods and apparatuses for determining scrambling codes for signal transmission Jun. 14, 2011
7940930 Native scrambling system May. 10, 2011
7917770 Configurable data masking for software testing Mar. 29, 2011
7899190 Security countermeasures for power analysis attacks Mar. 1, 2011
7870393 Steganographic method and device Jan. 11, 2011
7865057 Method and apparatus for conveying rights across an analog video interface Jan. 4, 2011
7853121 Recording medium, reproduction device, program, and reproduction method Dec. 14, 2010
7844054 Stream recording and/or reproducing apparatus and method Nov. 30, 2010
7839998 Transcoding CableCARD Nov. 23, 2010
7840005 Synchronization of media signals Nov. 23, 2010
7817902 Apparatus and method of generating video-reproducing clock signal from 480p signal Oct. 19, 2010
7796755 Storage of digital data Sep. 14, 2010
7796753 Digital anti-counterfeiting software method and apparatus Sep. 14, 2010
7778419 Key masking for cryptographic processes Aug. 17, 2010
7664263 Method for combining transfer functions with predetermined key creation Feb. 16, 2010

1 2 3

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