Data recorder restoring original data allowed to exist only...

Details Data recorder restoring original data allowed to exist only... Data recorder restoring original data allowed to exist only...

2011-04-19

2011-04-19

Kim, Jung (Department: 2432)

Electrical computers and digital processing systems: support

Data processing protection using cryptography

By stored data protection

C711S165000

Reexamination Certificate

active

07930558

ABSTRACT:
A log region (1415A) and a license region (1415B) are arranged in a memory of a memory card. The license region (1415B) stores licenses such as license IDs and license keys Kc as well as validity flags corresponding to entry numbers0-(N−1). The log region (1415A) includes a receive log (70) and a send log (80). The memory card serving as a sender of the license accepts a receive state from the memory card on a receiver side, and validates the validity flag of a region designated by the entry number in the send log (8) when the receive state is ON. Consequently, even when communication is interrupted during shifting or copying of the license, the license to be shifted or copied can be restored.

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