On the efficiency of nonrepudiable threshold proxy signature scheme with known signers

摘要

In the (t, n) proxy signature scheme, the signature signed by the original signer can be signed by t or more proxy signers out of a proxy group of n proxy signers. Recently, Hsu et al. proposed a nonrepudiable threshold proxy signature scheme with known signers. In this article, we shall propose an improvement of Hsu et al.'s scheme that is more efficient in terms of computational complexity and Communication cost. (C) 2003 Elsevier Inc. All rights reserved.