Albert Levi and M. Ufuk Caglayan, "The Problem of Trusted Third Party in Authentication and Digital Signature Protocols ", ISCIS-XII, The Twelfth International Symposium on Computer and Information Sciences, 27 - 29 October 1997, Antalya, Turkiye.

Abstract - Most of the authentication and digital signature protocols assume the existence of a trusted third party either as an authentication server or certification authority. However, such servers and authorities create both security and fault intolerance bottlenecks within the protocols. This problem can be solved by combining a secret sharing scheme with authentication and digital signature protocols. This paper describes the difficulties to combine a secret sharing scheme with the authentication and digital signature protocols and proposes a draft solution.
 

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