Revocation of a system administrator in an encrypted file system
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United States of America Patent
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Apr 3, 2012
Grant Date -
May 7, 2009
app pub date -
Nov 1, 2007
filing date -
Nov 1, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A method of securely storing electronic information includes a step in which target electronically stored information is encrypted with a first encryption key and then partitioned into a first set of encrypted ESI partitions a subset of which is able to reconstruct the unpartitioned encrypted ESI. This first set of encrypted ESI partitions is then encrypted with a first set of user encryption keys to form a first set of user-associated encrypted ESI partitions that are made available to a first set of users. When access to the target electronically stored information is changed, the target electronically stored information is accessed and then re-encrypted with a second encryption key to form a second encrypted ESI. This second encrypted ESI is then partitioned and distributed to a second set of users.
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