Side-Channel Attacks on Symmetric Encryption Schemes: The Case for Authenticated Encryption
John Black, Hector Urtubia · 2002
Vaudenay recently demonstrated side-channel attacks on a common encryption scheme, CBC Mode encryption, exploiting a \\valid padding" oracle [Vau02]. Mirroring the side-channel attacks of Bleichenbacher [Ble98] and Manger [Man01] on asymmetric schemes, he showed that symmetric encryption methods are just as vulnerable to side-channel weaknesses when an adversary is able to distinguish between valid and invalid ciphertexts.