ABC is a synchronous stream cipher submitted to eSTREAM [4]. In the previous paper [3] we suggested minor tweaks that increase the period and the secret state of ABC. Here we describe how these tweaks make ABC v.2 [5] resistant to certain attacks, including the ones presented in [6] and [7]. We also note that the paper [8] contains multiple errors and the distinguisher for ABC v.2 has complexity greater than the brute force attack.

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@inproceedings{AnashinABCIS, title={ABC Is Safe And Sound}, author={Vladimir Anashin and Andrey Bogdanov and Ilya Kizhvatov} }