Public-Key Encryption Schemes With Bounded CCA Security and Optimal Ciphertext Length Based on the CDH and HDH Assumptions
In Cramer et al. (2007, Bounded CCA2-Secure Encryption. In Kurosawa, K. (ed.), Advances in Cryptology - ASIACRYPT 2007, Kuching, Malaysia, December 2-6, Lecture Notes in Computer Science, Vol. 4833, pp. 502-518. Springer, Berlin, Germany) proposed a public-key encryption scheme secure against adversaries with a bounded number of decryption queries based on the decisional Diffie-Hellman problem. In this paper, we show that the same result can be obtained based on weaker computational assumptions, namely: the computational Diffie-Hellman and the hashed Diffie-Hellman assumptions.
The Computer Journal
pre-print, post-print (with 12 month embargo)
Pereira, Mayana; Dowsley, Rafael; Nascimento, Anderson C.; and Hanaoka, Goichiro, "Public-Key Encryption Schemes With Bounded CCA Security and Optimal Ciphertext Length Based on the CDH and HDH Assumptions" (2015). School of Engineering and Technology Publications. 41.