Data recorder restoring original data allowed to exist only uniquely
First Claim
1. A data storage device (120) for shifting specific data allowed to exist uniquely to a different data storage device (110, 520), comprising:
- a history information holding unit (1415A, 80) holding first history information (81) for specifying processing of shifting said specific data to said different data storage device (110, 520);
a specific data holding unit (1415B) holding said specific data; and
a control unit (1420), wherein said control unit (1420) changes a state to a state inhibiting external output of said specific data in the operation of shifting said specific data to said different data storage device (110. 520), and said control unit (1420) receives, in response to a request for restoration of said specific data, communication information (73) representing a state of communication with said different data storage device (110, 520) and held in said different data storage device (110, 520) and second history information (72) for specifying said shifting processing held in said different data storage device (110, 520), checks the state of communication with said different data storage device (110, 520) based on said communication information (73), determines whether said second history information (72) matches with said first history information (71) or not, when said communication information (73) represents that said shifting is being performed, and restores the state allowing external output of said specific data when said second history information (72) matches with said first history information (81).
2 Assignments
0 Petitions
Accused Products
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 numbers 0 (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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Citations
17 Claims
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1. A data storage device (120) for shifting specific data allowed to exist uniquely to a different data storage device (110, 520), comprising:
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a history information holding unit (1415A, 80) holding first history information (81) for specifying processing of shifting said specific data to said different data storage device (110, 520);
a specific data holding unit (1415B) holding said specific data; and
a control unit (1420), wherein said control unit (1420) changes a state to a state inhibiting external output of said specific data in the operation of shifting said specific data to said different data storage device (110. 520), and said control unit (1420) receives, in response to a request for restoration of said specific data, communication information (73) representing a state of communication with said different data storage device (110, 520) and held in said different data storage device (110, 520) and second history information (72) for specifying said shifting processing held in said different data storage device (110, 520), checks the state of communication with said different data storage device (110, 520) based on said communication information (73), determines whether said second history information (72) matches with said first history information (71) or not, when said communication information (73) represents that said shifting is being performed, and restores the state allowing external output of said specific data when said second history information (72) matches with said first history information (81). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification