Difference between direct and arbitrated digital signature
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The Direct Digital Signature
Understanding a direct digital signature begins by recognizing there are only two parties involved in the passing of the signed information: the sender and the receiver. Direct digital signatures only require these two entities because the receiver of the data (digital signature) knows the public key used by the sender. And the sender of the signature trusts the receiver not to alter the document in any way.
The Arbitrated Digital Signature
Implementing an arbitrated digital signature invites a third party into the process called a "trusted arbiter." The role of the trusted arbiter is usually twofold: first this independent third party verifies the integrity of the signed message or data. Second, the trusted arbiter dates, or time-stamps, the document, verifying receipt and the passing on of the signed document to its intended final destination.
Understanding a direct digital signature begins by recognizing there are only two parties involved in the passing of the signed information: the sender and the receiver. Direct digital signatures only require these two entities because the receiver of the data (digital signature) knows the public key used by the sender. And the sender of the signature trusts the receiver not to alter the document in any way.
The Arbitrated Digital Signature
Implementing an arbitrated digital signature invites a third party into the process called a "trusted arbiter." The role of the trusted arbiter is usually twofold: first this independent third party verifies the integrity of the signed message or data. Second, the trusted arbiter dates, or time-stamps, the document, verifying receipt and the passing on of the signed document to its intended final destination.
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