On the Security of a Variation of Cramer-Shoup’s Public Key Scheme
Hung–Min Sun · 2008
In this paper, we show that a recently proposed variation of Cramer-Shoup’s public key scheme is insecure against the adaptive chosen ciphertext attack. Moreover, we showed that the proposed scheme doesn’t satisfy the non-malleability property, even under the weakest attack model ⎯ the chosen plaintext attack.