Method and apparatus for re-encrypting data in a transaction-based secure storage system
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United States of America Patent
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Sep 7, 2010
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N/A
app pub date -
Sep 30, 2003
filing date -
Sep 30, 2003
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Abstract
A method for re-encrypting encrypted data in a secure storage file system, including obtaining selected data to re-encrypt from the secure storage file system using a user data access record and the encrypted data, decrypting the selected data using a symmetric key, re-encrypting the selected data using a new symmetric key to obtain new encrypted data, encrypting the new symmetric key using a public key to obtain a new encrypted symmetric key, storing the new encrypted data and the new encrypted symmetric key if the public key is associated with a file system user having read permission, and storing an encrypted hash data if the file system user has write permission.
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