Non-Binding (Designated Verifier) Signature

ePrint Report: Non-Binding (Designated Verifier) Signature

Ehsan Ebrahimi

We argue that there are some scenarios in which
plausible deniability might be desired for a digital signature
scheme. For instance, the non-repudiation property of conventional
signature schemes is problematic in designing an Instant
Messaging system (WPES 2004). In this paper, we formally
define a non-binding signature scheme in which the Signer
is able to disavow her own signature if she wants, but, the
Verifier is not able to dispute a signature …

deniability digital digital signature eprint report instance instant messaging messaging non property report signature system