Public-key cryptosystems provably secure against chosen ciphertext attacks
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CRYPTO '98 Proceedings of the 18th Annual International Cryptology Conference on Advances in Cryptology
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CRYPTO '91 Proceedings of the 11th Annual International Cryptology Conference on Advances in Cryptology
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ACISP'10 Proceedings of the 15th Australasian conference on Information security and privacy
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Recently, Bellare and Palacio defined the plaintext awareness (PA-ness) in the standard model. In this paper, we study the relationship between the standard model PA-ness and the property about message hiding, that is, IND-CPA. Although these two notions seem to be independent at first glance, we show that PA-ness in the standard model implies the IND-CPA security if the encryption function is oneway. By using this result, we also showed that “PA + Oneway → IND-CCA2.” We also show that the computational PA-ness notion is strictly stronger than the statistical one.