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Class Information
Number: 380/223
Name: Cryptography > Video cryptography > Video electric signal modification (e.g., scrambling) > By modifying synchronizing signal > Key signal on separate carrier
Description: Subject matter wherein the signal needed to restore the modified synchronizing component is transmitted on a carrier distinct from the video carrier.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8611532 Managing media content decryption keys in encrypted media content distribution systems and methods Dec. 17, 2013
8599457 Image processing device, method, system and the associated program for generating a composite image Dec. 3, 2013
8578155 Address generating method and broadcast receiving apparatus Nov. 5, 2013
8498412 Method of providing an encrypted data stream Jul. 30, 2013
8479227 System and method for ensuring secure communication between TV and set back box Jul. 2, 2013
8464062 Systems, devices, and methods for securely transmitting a security parameter to a computing device Jun. 11, 2013
8339678 Apparatus, system, and method of process control based on the determination of embedded information Dec. 25, 2012
8335014 Image forming apparatus, control method, and program for copy-forgery-inhibited dot pattern calibration Dec. 18, 2012
8250665 Digital Broadcasting system and method of processing data in digital broadcasting system Aug. 21, 2012
8213050 Image processing device, method, system and the associated program for generating a composite image Jul. 3, 2012
8213602 Method and system for encrypting and decrypting a transport stream using multiple algorithms Jul. 3, 2012
8171292 Systems, devices, and methods for securely transmitting a security parameter to a computing device May. 1, 2012
8144368 Automated methods for distinguishing copies from original printed objects Mar. 27, 2012
8125691 Information processing apparatus and method, computer program and computer-readable recording medium for embedding watermark information Feb. 28, 2012
8089661 Embedding authentication information to prevent document spoofing Jan. 3, 2012
8090239 Identification-information recording system, management unit, recording unit and recording control circuit Jan. 3, 2012
8013833 Tag information display control apparatus, information processing apparatus, display apparatus, tag information display control method and recording medium Sep. 6, 2011
7970132 Reduced hierarchy key management system and method Jun. 28, 2011
7873826 Routing voice over internet (VoIP) call Jan. 18, 2011
7856104 System and method for ensuring secure communication between TV and set back box Dec. 21, 2010
7624264 Using time to determine a hash extension Nov. 24, 2009
7502471 System and method for protecting data streams in hardware components Mar. 10, 2009
7472280 Digital rights management Dec. 30, 2008
7463737 System and method for conditional access key encryption Dec. 9, 2008
7242772 Encryption apparatus and method for synchronizing multiple encryption keys with a data stream Jul. 10, 2007
7185362 Method and apparatus for security in a data processing system Feb. 27, 2007
7096200 System and method for evaluating and enhancing source anonymity for encrypted web traffic Aug. 22, 2006
7069590 System and method for protecting data streams in hardware components Jun. 27, 2006
7043021 Digital video content transmission ciphering and deciphering method and apparatus May. 9, 2006
6912513 Copy-protecting management using a user scrambling key Jun. 28, 2005
6772434 Device and method for the integrated presentation of a secondary service as a part of a primary service Aug. 3, 2004
6731758 Digital video content transmission ciphering and deciphering method and apparatus May. 4, 2004
6690795 Multiple keys for decrypting data in restricted-access television system Feb. 10, 2004
6570990 Method of protecting high definition video signal May. 27, 2003
6370209 Process for sensing manipulations of digital information Apr. 9, 2002
6317831 Method and apparatus for establishing a secure connection over a one-way data path Nov. 13, 2001
6292567 Sync suppression television security system with addressable sync restoration Sep. 18, 2001
6278780 Method of and an apparatus for generating internal crypto-keys Aug. 21, 2001
6252964 Authorization of services in a conditional access system Jun. 26, 2001
5812665 Switched channel system Sep. 22, 1998
5754650 Simultaneous multichannel television access control system and method May. 19, 1998
5682426 Subscriber site method and apparatus for decoding and selective interdiction of television channels Oct. 28, 1997
5488659 Encryption/decryption process and apparatus for a multichannel television system Jan. 30, 1996
5430799 Multichannel television signal scrambling and descrambling system and method Jul. 4, 1995
5412720 Interactive home information system May. 2, 1995
5402489 Scrambled video signal transmission system with pulse-code modulated subcarrier Mar. 28, 1995
5319709 System for broadband descrambling of sync suppressed television signals Jun. 7, 1994
5319708 System for the simultaneous coding of a number of television signals and for decoding thereof in radiofrequency Jun. 7, 1994
5230019 Key signal conversion device for CATV system Jul. 20, 1993
5206908 Method and apparatus for detecting timing pulses for scrambled television system Apr. 27, 1993

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