05606617 is referenced by 202 patents and cites 6 patents.

Cryptographic methods and apparatus are disclosed that enable forming and issuing of secret-key certificates. Contrary to the well-known cryptographic technique of public-key certificates, where a public-key certificate is a digital signature of a certification authority on a public key, pairs consisting of a public key and a corresponding secret-key certificate can be generated by anyone. As a result, a public-key directory based on secret-key certificates cannot help anyone in attacking the signature scheme of the certification authority, and it does not reveal which of the listed public keys have been certified by the certification authority and which have not.

Yet, if a party associated with a public key can perform cryptographic actions with the secret key corresponding to its public key, such as decrypting, digital signing, issuing a secret-key certificate, and identification, then the certificate must have been computed by the certification authority.

Title
Secret-key certificates
Application Number
8/321855
Publication Number
5606617
Application Date
October 14, 1994
Publication Date
February 25, 1997
Inventor
Stefanus A Brands
Ina Boudier-Bakkerlaan 143, XW Utrecht
NL
Agent
Pennie & Edmonds
IPC
H04L 9/30
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