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Secure Integration of Asymmetric and Symmetric Encryption Schemes

1999; Springer Science+Business Media; Linguagem: Inglês

10.1007/3-540-48405-1_34

1611-3349

Eiichiro Fujisaki, Tatsuaki Okamoto,

Chaos-based Image/Signal Encryption

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 efficiently 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.