A Forward Secure and Backward Secure Digital Signature Scheme
Mingxing He · Journal of Wuhan University · 2008
This paper proposes a new scheme of digital signature with forward security and backward security at the same time.The main idea of this paper is that the secret key is expressed by the product of two parts,one part ensuring forward security and the other ensuring backward security,thus makes the previous key and the forthcoming key incomputable even when the present key is compromised.Other than the property of intrusion-resilience,the proposed scheme does not need other parties in key-evolving,compared to the existing schemes of forward security and intrusion-resilient signature.