G11B20/00217 - CPC Classification Index

ClassID:

198671 ⎘

G11B20/00217 - 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

Sub-classes:

G11B20/00224 » {wherein the key is obtained from a remote server} 141
G11B20/00231 » {wherein the key is obtained from a local external medium, e.g. a card} 55
G11B20/00239 » {wherein the key is provided by a software application accessing the medium} 5
G11B20/00246 » {wherein the key is obtained from a local device, e.g. device key initially stored by the player or by the recorder} 252
G11B20/00253 » {wherein the key is stored on the record carrier} 196
G11B20/00413 » {wherein the key is input by a user} 21

Recent Application in this class:

20220059130

System and method for encrypted disk drive sanitizing

20200026458

Systems and methods and systems for reading data sequentially on a media

20190182238

System and method for securing the life-cycle of user domain rights objects

20180268854

Information processing device and method of data reproduction

20170011768

Method and apparatus for converting and reproducing contents in storage medium

20160337343

System and method for securing the life-cycle of user domain rights objects

20160337342

System and method for securing the life-cycle of user domain rights objects

20150270972

Authorizing removable medium access

20150121551

System and method for securing the life-cycle of user domain rights objects

20140201539

Authorizing removable medium access

20140122868

Authenticator

20130142325

Memory

20130124854

Authenticator

20100306548

System and method for securing the life-cycle of user domain rights objects

16288339

Methods and systems for storing data sequentially on a media