International Association for Cryptologic Research

International Association
for Cryptologic Research


Paper: How to repair ESIGN

Louis Granboulan
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Abstract: The ESIGN signature scheme was provided with an inadequate proof of security. We propose two techniques to repair the scheme, which we name ESIGN-D and ESIGN-R. Another improvement of ESIGN is encouraged, where the public key is hashed together with the message. This allows to have a security proof in the multi key setting. Additionally, the lower security of ESIGN compared to RSA-PSS leads to suggest that a common public key is used for ESIGN and RSA-PSS, leaving to the signer the choice between fast signature or better security.
  title={How to repair ESIGN},
  booktitle={IACR Eprint archive},
  keywords={public-key cryptography / digital signature scheme. proven security. design techniques.},
  note={SCN'02 - Third Conference on Security in Communication Networks 11946 received 7 Jun 2002, last revised 16 Sep 2002},
  author={Louis Granboulan},