Method for certifying public keys in a digital signature scheme
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United States of America Patent
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-
May 30, 1995
Grant Date -
N/A
app pub date -
Feb 1, 1994
filing date -
Feb 1, 1994
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method for certifying public keys of a digital signature scheme in a secure communications system is provided. The secure communications system in one in which there are authorities with previously-certified public verification keys. The method begins by having a user U present an authority a verification key PK.sub.U. The authority then identifies the presenting user as U. Thereafter, the authority verifies that the presenting user knows the secret signing key associated with PK.sub.U. If so, the authority computes a digital signature S relative to the authority's own public key PK.sub.A of its verification that PK.sub.U is the public key of user U. The authority then issues a certificate that PK.sub.U is the public key of user U, the certificate including both S and a certificate for PK.sub.A.
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