Efficient and secure data currentness systems
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United States of America Patent
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Feb 2, 2010
Grant Date -
Nov 25, 2004
app pub date -
May 13, 2004
filing date -
May 13, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
Indicating data currentness includes, on any date of a sequence of dates, issuing a proof indicating the currentness status of the data during a particular time interval. The proof may be a digital signature. The time interval may be in the form of a current date and an amount of time. The proof may include a digital signature of the time interval. The proof may include a digital signature of the time interval and the data. The proof may include a digital signature of the time interval and a compact form of the data, such as a hash. Indicating data currentness may also include distributing the proofs to a plurality of unsecure units that respond to requests by users for the proofs. Indicating data currentness may also include gathering a plurality of separate pieces of data and providing a single proof for the separate pieces of data. The data may be electronic documents.
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