New Attacks on the Stream Cipher TPy6 and Design of New Ciphers the TPy6-A and the TPy6-B

@inproceedings{Sekar2007NewAO,
  title={New Attacks on the Stream Cipher TPy6 and Design of New Ciphers the TPy6-A and the TPy6-B},
  author={Gautham Sekar and Souradyuti Paul and Bart Preneel},
  booktitle={IACR Cryptology ePrint Archive},
  year={2007}
}
The stream ciphers Py, Pypy and Py6 were designed by Biham and Seberry for the ECRYPT-eSTREAM project in 2005. The ciphers were promoted to the ‘Focus’ ciphers of the Phase II of the eSTREAM project. However, due to some cryptanalytic results on the ciphers, strengthened versions of the ciphers, namely TPy, TPypy and TPy6 were built. So far there exists no attacks on TPy6. In this paper, we find hitherto unknown weaknesses in the keystream generation algorithms of the Py6 and of its stronger… CONTINUE READING
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Tweaking the IV Setup of the Py Family of Ciphers – The Ciphers Tpy, TPypy, and TPy6,

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1 Excerpt

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Pypy (Roopy): Another Version of Py,

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1 Excerpt

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