Block and Stream Ciphers and the Creatures in Between

@inproceedings{Biryukov2007BlockAS,
  title={Block and Stream Ciphers and the Creatures in Between},
  author={Alex Biryukov},
  booktitle={Symmetric Cryptography},
  year={2007}
}
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. 

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