XMSS - a practical forward secure signature scheme based on minimal security assumptions

  • Authors:
  • Johannes Buchmann;Erik Dahmen;Andreas Hülsing

  • Affiliations:
  • Cryptography and Computeralgebra Department of Computer Science, TU Darmstadt, Germany;Cryptography and Computeralgebra Department of Computer Science, TU Darmstadt, Germany;Cryptography and Computeralgebra Department of Computer Science, TU Darmstadt, Germany

  • Venue:
  • PQCrypto'11 Proceedings of the 4th international conference on Post-Quantum Cryptography
  • Year:
  • 2011

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Abstract

We present the hash-based signature scheme XMSS. It is the first provably (forward) secure and practical signature scheme with minimal security requirements: a pseudorandom and a second preimage resistant (hash) function family. Its signature size is reduced to less than 25% compared to the best provably secure hash based signature scheme.