Random bit mask generation for obscuring data on nonvolatile...

Read- and write-access control circuits for decryption-key...

Read/write media key block

Receiving device for securely storing a content item, and...

Record carrier comprising encryption indication information

Record medium, recording apparatus for record medium,...

Recording and/or playback apparatus and method

Recording apparatus, recording medium, playback apparatus,...

Recording device

Recording medium cartridge and a recording-and-reproducing...

Recording medium containing copyright information, recording...

Recording medium having encrypted sound data recorded...

Recording medium with copy protection information formed in...

Recording medium, apparatus for decrypting data and method...

Recording medium, data recording method and apparatus, data...

Redundant path data switch and media translator

Reliable storage medium access control method and device

Reprogrammable security for controlling piracy and enabling...

Residue transfer for encrypted messages split across...