منابع مشابه
Cryptanalysis of Achterbahn
We present several attacks against the Achterbahn stream cipher, which was proposed to the eSTREAM competition. We can break the reduced and the full version with complexity of 2 and 2 steps. Extensions of our attacks are also described to break modified versions of the Achterbahn stream cipher, which were proposed following the publication of preliminary cryptanalysis results. These attacks hi...
متن کاملCryptanalysis of Achterbahn-128/80
A key recovery attack on the stream cipher Achterbahn128/80, a cipher in the second phase of eSTREAM, is given. The key observation is a high dependency between some input bits to the Boolean combining function generating the keystream. It results in the first known attacks on both the 128-bit and the 80-bit variants of the cipher. The amount of keystream bits required in the attacks is less th...
متن کاملCryptanalysis of Achterbahn-128/80
This paper presents two key-recovery attacks against Achterbahn-128/80, the last version of one of the stream cipher proposals in the eSTREAM project. The attack against the 80-bit variant, Achterbahn80, has complexity 2. The attack against Achterbahn-128 requires 2 operations and 2 keystream bits. These attacks are based on an improvement of the attack due to Hell and Johansson against Achterb...
متن کاملCryptanalysis of Achterbahn-Version 2
Achterbahn is one of the stream cipher proposals in the eSTREAM project. After the first version had been successfully cryptanalyzed, the second version, denoted Achterbahn-Version 2, was proposed. This paper demonstrates an attack on this second version. In the attack, a quadratic approximation of the output function is considered. The attack uses less keystream bits than the upper limit given...
متن کاملCryptanalysis of Achterbahn-128/80 with a New Keystream Limitation
This paper presents two key-recovery attacks against the last modi cation to Achterbahn-128/80 proposed by the authors at SASC 2007 due to the previous attacks. The 80-bit variant, Achterbahn-80, has been limited to produce at most 2 bits of keystream with the same pair of key and IV, while Achterbahn-128 is limited to 2. The attack against Achterbahn-80 has complexity 2 and needs fewer than 2 ...
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ژورنال
عنوان ژورنال: IET Information Security
سال: 2007
ISSN: 1751-8709
DOI: 10.1049/iet-ifs:20060153