Signature data object

Details Signature data object Signature data object

1993-07-02

1994-11-22

Swann, Tod R.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 23, 380 30, H04K 100

Patent

active

053675738

ABSTRACT:
A "signature data object" (SDO) is a machine-readable structured data record which a signer may associate with a parent object, e.g., an electronic document. An SDO comprises three required encoded parts: A signature header structure; a signature data structure; and a signature proof block. An SDO may include data identifying a role in which the signer is acting and a message code encoding a semantic for the parent object/document such as "submitted by," "approved," etc. In one embodiment, the SDO includes at least one descriptor of (1) a subordinate part of the parent object or (2) an attachment of the parent object/document, to whose (i) value or (ii) presence the validity of the signature data object is bound. An SDO may also include data indicating that it supersedes a specified other SDO associated with that parent object.

REFERENCES:
patent: 4405829 (1983-09-01), Rivest et al.
patent: 4930073 (1990-05-01), Cina, Jr.
patent: 5005200 (1991-04-01), Fischer
patent: 5136643 (1992-08-01), Fischer
patent: 5136647 (1992-08-01), Haber et al.
patent: 5189700 (1993-02-01), Blandford

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