198677 ⎘
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 stored on the record carrier the key being stored as a barcode
Sub-classes:Out-of band tokens for rights access
#2Out-of-band tokens for rights access
#3Out-of-band tokens for rights access
#4Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk
#5Media-following encryption policy control
#6Preventing unauthorized use of optical discs
#7RECORDING MEDIUM, ATTACHING KIT FOR ATTACHING ENCRYPTION KEY STICKER TO THE RECORDING MEDIUM, AND RECORDING APPARATUS AND REPRODUCING APPARATUS FOR THE RECORDING MEDIUM
#8RENDERING PRE-RECORDED AND ADDITIONAL CONTENT
#9Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk
#10METHOD AND APPARATUS FOR DATA ENCRYPTION AND DECRYPTION
#11Out-of-band tokens for rights access
#12User interface for creating and using media keys
#13Marking articles using a covert digitally watermarked image
#14Optical recording medium having BCA of write-once information
#15Bar code addressing audio playing device
#16Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk
#17Optical disc apparatus
#18Information access control for optical media
#19Magneto-optical recording medium having watermark for preventing unauthorized copy