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Class Information
Number: 380/207
Name: Cryptography > Video cryptography > Video electric signal masking > Including locally generated masking signal
Description: Subject matter wherein the masking signal is produced and added at or near a receiver.

Patents under this class:

Patent Number Title Of Patent Date Issued
8553881 Composite masking system and method for improving invisibility of high-definition video watermarking Oct. 8, 2013
8477937 Methods and systems for providing interference based physical-layer encryption Jul. 2, 2013
8467525 Steganographic method and device Jun. 18, 2013
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
8290145 Transition between masked representations of a value during cryptographic calculations Oct. 16, 2012
8238692 Device and method for outputting a private image using a public display Aug. 7, 2012
8224118 Device and method for outputting a private image using a public display Jul. 17, 2012
8204222 Steganographic encoding and decoding of auxiliary codes in media signals Jun. 19, 2012
8074081 Method for replacing contents of a data storage unit Dec. 6, 2011
8064457 System and method for filtering a data packet using a common filter Nov. 22, 2011
7978929 Device and method for outputting a private image using a public display Jul. 12, 2011
7940930 Native scrambling system May. 10, 2011
7870393 Steganographic method and device Jan. 11, 2011
7860245 Methods and systems for multi-party sorting of private values Dec. 28, 2010
7853121 Recording medium, reproduction device, program, and reproduction method Dec. 14, 2010
7817902 Apparatus and method of generating video-reproducing clock signal from 480p signal Oct. 19, 2010
7568100 Steganographic method and device Jul. 28, 2009
7447313 Pointers to encrypted data in RTP header Nov. 4, 2008
7391866 Broadcast apparatus and reception apparatus for providing a storage service by which scrambled content is stored and descrambled using scrambling key list Jun. 24, 2008
7386130 Encryption secured against DPA Jun. 10, 2008
7366908 Digital watermarking with content dependent keys and autocorrelation properties for synchronization Apr. 29, 2008
7315685 Method and apparatus for continuous feed of disks for recording digital video signals and authenticating the digitally recorded disks Jan. 1, 2008
7305087 Digital home network and method for creating and updating such a network Dec. 4, 2007
7086087 Information processing device, card device and information processing system Aug. 1, 2006
6980650 System for providing keys Dec. 27, 2005
6968058 Digital evidential camera system for generating alteration detection data using built-in encryption key Nov. 22, 2005
6925342 System and method for protecting digital media Aug. 2, 2005
6901516 System and method for ciphering data May. 31, 2005
6529209 Method for providing privately viewable data in a publically viewable display Mar. 4, 2003
6425082 Watermark applied to one-dimensional data Jul. 23, 2002
6330333 Cryptographic system for wireless communications Dec. 11, 2001
6272634 Digital watermarking to resolve multiple claims of ownership Aug. 7, 2001
6061793 Method and apparatus for embedding data, including watermarks, in human perceptible sounds May. 9, 2000
5396642 Variable frequency CATV jamming method and apparatus Mar. 7, 1995
5367269 System for producing an oscillating jamming signal utilizing a phase-locked loop Nov. 22, 1994
5351292 Method and apparatus for preventing external detection of signal information Sep. 27, 1994
5321747 Method and apparatus for preventing extraneous detection of signal information Jun. 14, 1994
5287539 Interdiction program denial system for jamming audio and video signals Feb. 15, 1994
5243647 Method and apparatus for broadband signal distribution Sep. 7, 1993
5216713 Method and apparatus for preventing extraneous detection of signal information Jun. 1, 1993
5157725 Method and apparatus for preventing external detection of signal information Oct. 20, 1992
5056138 Television selection system Oct. 8, 1991
4991206 Method and apparatus for jamming selected television programs Feb. 5, 1991
4896354 Image reception system Jan. 23, 1990
4682359 Television picture and sound scrambler and method Jul. 21, 1987
4599646 Method and apparatus for identifying unauthorized or defective converter/decoder boxes in CATV system Jul. 8, 1986
4521809 Method and apparatus for controlling access to selected television programs Jun. 4, 1985
4317213 Television reception interfering apparatus Feb. 23, 1982
4216500 Encoding and decoding system Aug. 5, 1980
4085422 Fee-charging apparatus for television sets Apr. 18, 1978

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