System for enabling lazy-revocation through recursive key generation
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United States of America Patent
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Apr 10, 2007
Grant Date -
May 1, 2003
app pub date -
Oct 31, 2001
filing date -
Oct 31, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
A plurality of users may have access to a file. The file is encrypted with a key. Access for a user to the file is revoked. A new key is generated from the current key of the file in response to said revocation, and the file is encrypted with the new key.
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