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Dates are inconsistent

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Possible spell-corrected query: hermes
2006/269 (PDF) (PS) Last updated: 2007-06-28
An Analysis of the Hermes8 Stream Ciphers
Steve Babbage, Carlos Cid, Norbert Pramstaller, Havard Raddum

Hermes8 is one of the stream ciphers submitted to the ECRYPT Stream Cipher Project (eSTREAM). In this paper we present an analysis of the Hermes8 stream ciphers. In particular, we show an attack on the latest version of the cipher (Hermes8F), which requires very few known keystream bytes and recovers the cipher secret key in less than a second on a normal PC. Furthermore, we make some remarks on the cipher's key schedule and discuss some properties of ciphers with similar algebraic structure...

2006/019 (PDF) Last updated: 2006-07-18
Hermes8 : A Low-Complexity Low-Power Stream Cipher
Ulrich Kaiser
Secret-key cryptography

Since stream ciphers have the reputation to be inefficient in software applications the new stream cipher Hermes8 has been developed. It is based on a 8-bit-architecture and an algorithm with low complexity. The two versions presented here are Hermes8-80 with 23 byte state and 10 byte key and furthermore Hermes8-128 with 37 byte state and 16 byte key. Both are suited to run efficiently on 8-bit micro computers and dedicated hardware (e.g. for embedded systems). The estimated performance is...

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