"Digital signatures, uniquely, have the following set ofcharacteristics. The signature is:
a. unique to the signer
b. capable of verification
c. under the signer's sole control
d. linked to the record in such a manner that it can be
determined if any data contained in the record was changed
subsequent to the electronic signature being affixed to
the record
e. and created by a method appropriately reliable for the
purpose for which the electronic signature was used.
Legal Signatures and Electronic Signatures
The American Bar Association (ABA) defines a "legal
signature" as having the following characteristics:
Signer authentication: To provide good evidence of who
participated in a transaction, a signature should indicate
by whom a document or message is signed
and be difficult for any other person to produce without
authorization.
Document authentication: To provide good evidence of the
substance of the transaction, a signature should identify
what is signed, and make it impracticable to
falsify or alter, without detection, either the signed
matter or the signature.
Affirmative act: To serve the ceremonial and approval
functions of a signature, a person should be able to
create a signature to mark an event, indicate approval and
authorization, and establish the sense of having legally
consummated a transaction.
Efficiency: Optimally, a signature and its creation and
verification processes should provide the greatest
possible assurance of authenticity and validity with the
least possible expenditure of resources. (2)"
- Z MSDN:
- http://blogs.msdn.com/shawnfa/archive/2004/03/31/105137.aspx
- http://blogs.msdn.com/shawnfa/archive/2004/01/22/61779.aspx
- http://blogs.msdn.com/shawnfa/archive/2005/11/03/488807.aspx
- http://msdn.microsoft.com/msdnmag/issues/04/11/XMLSignatures/
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