C.-C. Lee, L.-H. Li, and M.-S. Hwang (Taiwan)
Cryptography, digital signature, key agreement.
Recently, He and Wu proposed defense improvement of Harn's digital signature for Diffie-Hellman public keys against the Nyberg-Reppel attack. In this article, we point out that He and Wu's scheme is vulnerable to the replay attack. An improvement of He and Wu's digital signature for Diffie-Hellman public keys based on time-stamp is pro posed in this article.
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