Method and apparatus for deleting data upon expiration
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United States of America Patent
Stats
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Jul 7, 2009
Grant Date -
Jun 29, 2006
app pub date -
Feb 4, 2005
filing date -
Feb 4, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method and apparatus for efficiently deleting data including backup or snapshots upon expiration are disclosed. The data can be deleted even without physical access to the data. A data generation unit generates a data. Each data has an expiration time and should be deleted upon expiration. An encryption unit encrypts the data, and the encrypted data is stored in data storage. A controller monitors whether there is an expired data, and if there is an expired data, the controller deletes a key necessary for decrypting the expired data.
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