Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2006-06-13
2006-06-13
Zand, Kambiz (Department: 2132)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C713S161000, C713S170000, C713S182000, C380S229000
Reexamination Certificate
active
07062652
ABSTRACT:
A semiconductor memory card comprising a control IC302, a flash memory303, and a ROM304. The ROM304holds information such as a medium ID341unique to the semiconductor memory card. The flash memory303includes an authentication memory332and a non-authentication memory331. The authentication memory332can be accessed only by external devices which have been affirmatively authenticated. The non-authentication memory331can be accessed by external devices whether the external devices have been affirmatively authenticated or not. The control IC302includes control units325and326, an authentication unit321and the like. The control units325and326control accesses to the authentication memory332and the non-authentication memory331, respectively. The authentication unit321executes a mutual authentication with an external device.
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Copending U.S. Appl. No. 09/580,909, filed May 26, 2000, Tagawa et al.
Hirota Teruto
Kozuka Masayuki
Minami Masataka
Tatebayashi Makoto
Yugawa Taihei
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