Block and Stream Ciphers and the Creatures in Between

In this paper we define a notion of leak extraction from a block cipher. We demonstrate this new concept on an example of AES. A result is LEX: a simple AES-based stream cipher which is at least 2.5 times faster than AES both in software and in hardware.

• Type: Conference
• Year: 2007
• Where: DAGSTUHL
• Authors: Alex Biryukov
• Keywords: AES-based Stream Cipher, Block Cipher, DAGSTUHL 2007, Leak Extraction, Software Engineering