A new public-key cryptosystem

  • Authors:
  • David Naccache;Jacques Stern

  • Affiliations:
  • Gemplus Card International, Sarcelles Cedex, France;Ecole Normale Supérieure, Paris Cedex 5, France

  • Venue:
  • EUROCRYPT'97 Proceedings of the 16th annual international conference on Theory and application of cryptographic techniques
  • Year:
  • 1997

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Abstract

This paper describes a new public-key cryptosystem where the ciphertext is obtained by multiplying the public-keys indexed by the message bits and the cleartext is recovered by factoring the ciphertext raised to a secret power. Encryption requires four multiplications/byte and decryption is roughly equivalent to the generation of an RSA signature.