Tractable rational map signature

  • Authors:
  • Lih-Chung Wang;Yuh-Hua Hu;Feipei Lai;Chun-Yen Chou;Bo-Yin Yang

  • Affiliations:
  • Department of Applied Mathematics, National Donghwa University, Hualien, Taiwan;Department of Computer Science and Information Engineering, National Taiwan University, Taipei, Taiwan;Departments of Electrical Engineering &, of Computer Science and Information Engineering, National Taiwan University, Taipei, Taiwan;Department of Mathematical Education, National Hualien Teachers College, Hualien, Taiwan;Dept. of Mathematics, Tamkang University, Tamsui, Taiwan

  • Venue:
  • PKC'05 Proceedings of the 8th international conference on Theory and Practice in Public Key Cryptography
  • Year:
  • 2005

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Abstract

Digital signature schemes are crucial for applications in electronic commerce. The effectiveness and security of a digital signature scheme rely on its underlying public key cryptosystem. Trapdoor functions are central to public key cryptosystems. However, the modular exponentiation for RSA or the discrete logarithms for ElGamal/DSA/ECC, as the choice of the trapdoor functions, are relatively slow in performance. Some multivariate schemes has potentially much higher performance than other public key cryptosystems. We present a new multivariate digital signature scheme (TRMS) based on tractable rational maps. We also give some security analysis and some actual implementation data in comparison to some other signature schemes.