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Class Information
Number: 380/26
Name: Cryptography > Electric signal modification > Having mechanical control of signal encryption (e.g., cam)
Description: Subject matter including an electrical element controlled by the motion of physical configuration of a solid object.

Sub-classes under this class:

Class Number Class Name Patents
380/27 By perforated record 19

Patents under this class:

Patent Number Title Of Patent Date Issued
8577032 Common key block encryption device, common key block encryption method, and program Nov. 5, 2013
8363825 Device for and method of collision-free hashing for near-match inputs Jan. 29, 2013
8243922 Digital content modification for content protection Aug. 14, 2012
8200972 Encryption of security-sensitive data by re-using a connection Jun. 12, 2012
8131646 Reprogrammable security for controlling piracy and enabling interactive content using revocation status Mar. 6, 2012
8132240 Electric field unit and method for executing a protected function of an electric field unit Mar. 6, 2012
8086873 Method for controlling file access on computer systems Dec. 27, 2011
7971785 Method for authenticating micro-processor cards, corresponding micro-processor card, card reader terminal and programs Jul. 5, 2011
7886142 Apparatus and method for scrambling a packet data channel and a packet data control channel in a mobile communication system for high-speed packet transmission Feb. 8, 2011
7860239 Method and apparatus for metering usage of software products using multiple signatures Dec. 28, 2010
7742594 Pipelined packet encryption and decryption using counter mode with cipher-block chaining message authentication code protocol Jun. 22, 2010
7702101 Secure presentation of media streams in response to encrypted digital content Apr. 20, 2010
7567669 Strengthened public key protocol Jul. 28, 2009
7401221 Advanced stream format (ASF) data stream header object protection Jul. 15, 2008
7299493 Techniques for dynamically establishing and managing authentication and trust relationships Nov. 20, 2007
7239709 Data recording/reproducing method, data recording/reproducing system, recording apparatus Jul. 3, 2007
7043645 Reproducing apparatus, recording apparatus and display apparatus May. 9, 2006
6952478 Method and system for performing permutations using permutation instructions based on modified omega and flip stages Oct. 4, 2005
6587948 Recording apparatus, recording medium, playback apparatus, recording method and playback method Jul. 1, 2003
6496107 Voice-controlled vehicle control system Dec. 17, 2002
6175625 Control circuits for electric coding machines Jan. 16, 2001
6130946 Cryptographs Oct. 10, 2000
6097812 Cryptographic system Aug. 1, 2000
6083667 Optical recording medium Jul. 4, 2000
6055635 Method and device for facilitating access to a multitude of alphanumeric sequences Apr. 25, 2000
5724427 Method and apparatus for autokey rotor encryption Mar. 3, 1998
4675477 Electronic device providing automatic permutations of a Vigenere Square Jun. 23, 1987
4401973 Cycle limiting means for an electromechanical decoder Aug. 30, 1983
4343967 Autokey code generator Aug. 10, 1982
4208545 Secrecy system Jun. 17, 1980
4204088 Means for establishing various communication conditions in a cryptographic system May. 20, 1980
4187393 Key generator Feb. 5, 1980
4182929 Circuit for simulating the scrambling of an electromechanical rotor Jan. 8, 1980
4177485 Facsimile apparatus Dec. 4, 1979
4177486 Facsimile device Dec. 4, 1979
4173025 Electrical signal scrambling apparatus Oct. 30, 1979
4156314 Rotors for a ciphering machine May. 29, 1979
4124311 Mechanical movements for coding machines Nov. 7, 1978
3984922 Rotors Oct. 12, 1976

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