Designated Confirmer Signature
Give a brief explanation of the term Designated Confirmer Signature.
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A designated confirmer signature [or Cha94] smacks the balance between self-authenticating digital signatures and zero-knowledge proofs. While former permits anybody to find out the signature, latter can only convince one recipient at the time of the authenticity of the given document, and only by interaction with the signer. A designated confirmer signature permits certain designated parties to confirm the authenticity of a document without the need for the signer's input. At the similar time, devoid of the aid of either the signer or designated parties, it is not probable to discover the authenticity of the given document. Chaum developed implementations of the designated confirmer signatures with one or more confirmers using the RSA digital signatures.
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