In cryptography, ABC is a stream cypher algorithm developed by Vladimir Anashin, Andrey Bogdanov, Ilya Kizhvatov, and Sandeep Kumar. It has been submitted to the eSTREAM Project of the eCRYPT network. It takes a 128-bit key and a 128-bit IV. The claimed security level of 2 128 {\displaystyle 2^{128}} bits has been reduced to 2 88 {\displaystyle 2^{88}} .
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