filename : pkcs title : Chosen Ciphertext Attacks against Protocols Based on RSA Encryption Standard PKCS#1 author : Daniel Bleichenbacher type : inproceedings organization : Lucent Technologies booktitle : Advances in Cryptology -- CRYPTO' 98 series : Lecture Notes in Computer Science publisher : Springer-Verlag, Berlin editor : H. Krawczyk volume : 1462 pages : 1-12 abstract : This paper introduces a new adaptive chosen ciphertext attack against certain protocols based on RSA. We show that an RSA private-key operation can be performed if the attacker has access to an oracle that, for any chosen ciphertext, returns only one bit telling whether the ciphertext corresponds to some unknown block of data encrypted using PKCS #1. An example of a protocol susceptible to our attack is SSL V.3.0.