Secure Integration of Asymmetric and Symmetric Encryption Schemes

  • Authors:
  • Eiichiro Fujisaki;Tatsuaki Okamoto

  • Affiliations:
  • -;-

  • Venue:
  • CRYPTO '99 Proceedings of the 19th Annual International Cryptology Conference on Advances in Cryptology
  • Year:
  • 1999

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Abstract

This paper shows a generic and simple conversion from weak asymmetric and symmetric encryption schemes into an asymmetric encryption scheme which is secure in a very strong sense -- indistinguishability against adaptive chosen-ciphertext attacks in the random oracle model. In particular, this conversion can be applied effciently to an asymmetric encryption scheme that provides a large enough coin space and, for every message, many enough variants of the encryption, like the ElGamal encryption scheme.