Method and apparatus for validating a digital signature

Details Method and apparatus for validating a digital signature Method and apparatus for validating a digital signature

2007-02-13

2007-02-13

Zand, Kambiz (Department: 2132)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C713S175000, C713S181000

Reexamination Certificate

active

09780833

ABSTRACT:
Method and system are described for validating a digital signature. More particularly, a signed message and a corresponding certificate are received. The certificate is checked for validation. A validation statement is generated, and the certificate validation and the signed message provide a status. This status represents a request for validation, and is provided along with a set of validations among which such status is an element. A digest is generated using a Merkle authentication tree corresponding to the set of validations, and this digest is signed with a private key. Accordingly, a notary may provide the signed digest, status and the set of validations for subsequent confirmation of the digital signature.

REFERENCES:
patent: 6209095 (2001-03-01), Anderson et al.
patent: 6314517 (2001-11-01), Moses et al.
patent: 6389538 (2002-05-01), Gruse et al.
patent: 2001/0018739 (2001-08-01), Anderson et al.

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