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System for enabling lazy-revocation through recursive key generation

  • US 20030081787A1
  • Filed: 10/31/2001
  • Published: 05/01/2003
  • Est. Priority Date: 10/31/2001
  • Status: Active Grant
First Claim
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1. A method of enabling lazy-revocation in a cryptographic file system, said method comprising:

  • revoking access of a user of a plurality of users to a file;

    generating a new version of a key based on a current version of said key; and

    encrypting said file with said new version of said key in response to an update of said file.

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