ACAC Seminar Abstract

ACAC Seminar Abstract

ACAC Seminars

ACAC Seminar Abstract

How to Strengthen any Weakly Unforgeable Signature into a Strongly Unforgeable Signature

Speaker: Ron Steinfeld (joint work with J. Pieprzyk and H. Wang)
Date, Time: Fri, 16 Mar 2007 11:00

Standard signature schemes are usually designed only to achieve weak unforgeability, preventing forgery of signatures on new messages not previously signed. However, some applications require strong unforgeability, preventing also forgery of new signatures on previously signed messages. Motivated by such applications, we present a general transform for strengthening a given weakly unforgeable signature into a strongly unforgeable signature using a trapdoor hash function. We also review other such transforms proposed in the literature.

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