[Resource Topic] 2009/110: On the Security of Stream Cipher CryptMT v3

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On the Security of Stream Cipher CryptMT v3

Authors: Haina Zhang, Xiaoyun Wang


CryptMT v3 is a stream cipher submitted to eStream project, and has entered the third evaluation phase. Any attack has not been found until now. In this paper, we mainly discuss the security of the state initialization process of CryptMT v3. For the key and IV setup function f_K, we can construct a probabilistic testing algorithm A^{f_K} with a distinguishing probability 1, which indicates that for each key K, f_K is a non-PRF. However, we have not found any non-randomness about the keystream output.

ePrint: https://eprint.iacr.org/2009/110

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