×

Time delayed key escrow

  • US 5,768,388 A
  • Filed: 03/21/1996
  • Issued: 06/16/1998
  • Est. Priority Date: 03/01/1996
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method of providing different levels of computational difficulty for recovering an encrypted communication, so that a first entity experiences less computational difficulty than other entities, the method comprising the steps of:

  • encrypting the communication so that an entity in possession of a secret key can recover the encrypted communication without computational difficulty;

    providing the first entity with first information about the secret key, the first information comprising weakly-encrypted information about the secret key;

    the weakly encrypted information being enough information that the encrypted communications can be recovered with a predetermined level of computational difficulty less than that for the other entities.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×