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ENCRYPTION SYSTEM WITH TIME-DEPENDENT DECRYPTION

  • US 20010052071A1
  • Filed: 07/14/1998
  • Published: 12/13/2001
  • Est. Priority Date: 08/22/1997
  • Status: Active Grant
First Claim
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1. An encryption system with time-dependent decryption, including a time-key manager for guaranteeing that a time for enabling decryption of information is limited, (1) wherein, upon receipt of a request from an information server, said time-key manager transmits to said information server a time-key certificate including disclosure time information and a public key for encryption;

  • and (2) wherein said information server transmits to an information user information encrypted using said public key, which is included in said time-key certificate, and said time-key manager, following the receipt of a request for a decryption key from said information user, transmits said decryption key to said information user at such time said disclosure time has been reached.

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