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- W1994591449 abstract "Time-Memory Tradeoff (TMTO) attacks on stream ciphers are a serious security threat and the resistance to this class of attacks is an important criterion in the design of a modern stream cipher. TMTO attacks are especially effective against stream ciphers where a variant of the TMTO attack can make use of multiple data to reduce the off-line and the on-line time complexities of the attack (given a fixed amount of memory). In this paper we present a new approach to TMTO attacks against stream ciphers using a publicly known initial value (IV): We suggest not to treat the IV as part of the secret key material (as done in current attacks), but rather to choose in advance some IVs and apply a TMTO attack to streams produced using these IVs. We show that while the obtained tradeoff curve is identical to the curve obtained by the current approach, the new technique allows to mount the TMTO attack in a larger variety of settings. For example, if both the secret key and the IV are of length n, it is possible to mount an attack with data, time, and memory complexities of 24n/5, while in the current approach, either the time complexity or the memory complexity is not less than 2n." @default.
- W1994591449 created "2016-06-24" @default.
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- W1994591449 date "2008-08-01" @default.
- W1994591449 modified "2023-10-17" @default.
- W1994591449 title "Treatment of the initial value in Time-Memory-Data Tradeoff attacks on stream ciphers" @default.
- W1994591449 cites W2012646342 @default.
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- W1994591449 doi "https://doi.org/10.1016/j.ipl.2008.01.011" @default.
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