Electrical computers and digital processing systems: support – Data processing protection using cryptography – By stored data protection
Reexamination Certificate
2011-02-15
2011-02-15
Vu, Kimyen (Department: 2435)
Electrical computers and digital processing systems: support
Data processing protection using cryptography
By stored data protection
C380S044000, C726S022000
Reexamination Certificate
active
07890773
ABSTRACT:
A user terminal converts stored contents of an SD card to contain second encrypted content key data equivalent to an encrypted title key of SD Audio, and encrypted content equivalent to encrypted content of the SD Audio. Accordingly, compatibility can be realized between an encryption dual key system as a first encryption system and an encryption (single) key system as a second encryption system.
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Ishida Shigeru
Kasahara Akihiro
Miura Akira
Nakano Kazunori
Suu Hiroshi
Kabushiki Kaisha Toshiba
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Pan Joseph
Vu Kimyen
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