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Advances in Cryptology — CRYPTO' 92
This paper presents three mcthods for strengthening public key cryptosystems in such a way t,hat they become secure against adaptiuely chosen ciphertext attacks. In an adaptively chosen ciphertext attack, an attacker can query the deciphering algorithm with any ciphertexts, ezcept for t h e exact object ciphertext to becryptanalyzed. The first strengthening method is based on the use of one-way hash functions, the second on the use of universal hash functions and the third on the use of digitaldoi:10.1007/3-540-48071-4_20 dblp:conf/crypto/ZhengS92 fatcat:ynips7jm3jdk5d2o3gqea7xvp4