G11B20/00231 - CPC Classification Index

ClassID:

198673 ⎘

G11B20/00231 - CPC Classification

Classification description:

Signal processing not specific to the method of recording or reproducing; Circuits therefor; Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is obtained from a local external medium, e.g. a card

Recent Application in this class:

20130283390

2013-10-24

System, method and apparatus for controlling the dissemination of digital works

20120233462

2012-09-13

Method and system for automatically logging in a client

20120158550

2012-06-21

MUSIC METHODS AND SYSTEMS

20110264923

2011-10-27

Method and system for secure access to non-volatile memory

20110255690

2011-10-20

Reprogrammable security for controlling piracy and enabling interactive content

20110243375

2011-10-06

Inserting watermarks into portions of digital signals

20110231658

2011-09-22

System, method and apparatus for controlling the dissemination of digital works

20110229107

2011-09-22

System, method and apparatus for controlling the dissemination of digital works

20110208967

2011-08-25

Management apparatus and copying apparatus

#10

20110010565

2011-01-13

Apparatus and method for storing key data, library unit, and storage device

#11

20100313034

2010-12-09

INFORMATION PROCESSING APPARATUS, DATA RECORDING SYSTEM, INFORMATION PROCESSING METHOD, AND PROGRAM

#12

20100131767

2010-05-27

Methods for audio watermarking and decoding

#13

20090316565

2009-12-24

Method and system for activation of an optical article

#14

20090100273

2009-04-16

Prevent data storage device circuitry swap

#15

20090022477

2009-01-22

RECORDING BROADCAST DIGITAL CONTENT IN A PRIVACY PRESERVING WAY

#16

20080285751

2008-11-20

Deterring theft of media recording devices by encrypting recorded media files

#17

20080165966

2008-07-10

Information recording/reproducing device

#18

20080159588

2008-07-03

Methods for marking images

#19

20080141038

2008-06-12

Digital information recording apparatus and recording/reproducing apparatus

#20

20080137848

2008-06-12

Reprogrammable security for controlling piracy and enabling interactive content using revocation status

#21

20080137515

2008-06-12

OPTICAL INFORMATION RECORDING/REPRODUCING APPARATUS AND OPTICAL INFORMATION RECORDING MEDIUM

#22

20080133938

2008-06-05

Self-protecting digital content

#23

20080101604

2008-05-01

Self-protecting digital content

#24

20070248169

2007-10-25

Method and Apparatus for Coding Information

#25

20070234215

2007-10-04

User interface for creating and using media keys

#26

20070206682

2007-09-06

Method And Apparatus For Coding Information

#27

20070185892

2007-08-09

Method and Apparatus for Coding Information

#28

20070183509

2007-08-09

METHOD AND APPARATUS FOR CODING INFORMATION

#29

20070174334

2007-07-26

Data processing apparatus and data processing method

#30

20070127352

2007-06-07

Optical recording medium having BCA of write-once information

#31

20070116294

2007-05-24

Cryptographic key distribution system and method for digital video systems

#32

20070104056

2007-05-10

Method for transmitting a write strategy to a laser driver

#33

20070071416

2007-03-29

Image management apparatus and method

#34

20070071109

2007-03-29

Method and apparatus for coding information

#35

20070033419

2007-02-08

Reprogrammable security for controlling piracy and enabling interactive content

#36

20070019741

2007-01-25

Method and Apparatus for Coding Information

#37

20060291653

2006-12-28

Data player, digital contents player, playback system, data embedding apparatus, and embedded data detection apparatus

#38

20060291652

2006-12-28

Data player, digital contents player, playback system, data embedding apparatus, and embedded data detection apparatus

#39

20060285688

2006-12-21

Data player, digital contents player, playback system, data embedding apparatus, and embedded data detection apparatus

#40

20060285687

2006-12-21

Data player, digital contents player, playback system, data embedding apparatus, and embedded data detection apparatus

#41

20060274835

2006-12-07

METHOD AND APPARATUS FOR CODING INFORMATION

#42

20060268993

2006-11-30

Method and Apparatus for Coding Information

#43

20060251291

2006-11-09

Methods and systems for inserting watermarks in digital signals

#44

20060133646

2006-06-22

Video steganography

#45

20060123483

2006-06-08

Method and system for protecting against illegal copy and/or use of digital contents stored on optical or other media

#46

20060109984

2006-05-25

Methods for audio watermarking and decoding

#47

20060080741

2006-04-13

System, method and apparatus for controlling the dissemination of digital works

#48

20050234826

2005-10-20

Storage medium rental system

#49

20050201556

2005-09-15

Trick play of encrypted data in a conditional access signal

#50

20050163026

2005-07-28

Magneto-optical recording medium having watermark for preventing unauthorized copy

#51

20050123278

2005-06-09

Broadcast receiver, program recording method and program product

#52

20050091681

2005-04-28

Systems and methods for video storage and display

#53

20050078825

2005-04-14

Encryption apparatus, decryption apparatus, secret key generation apparatus, and copyright protection system

#54

20050069139

2005-03-31

Information-signal encrypting apparatus and information-signal decrypting apparatus

#55

20050031156

2005-02-10

Video steganography