Correlations in RC 6 on 256 - bit blocks ∗
نویسنده
چکیده
Earlier it has been reported that there exist correlation attacks on RC6 with 128-bit blocks with a reduced number of rounds. In this note it is investigated how well RC6 with 256-bit blocks resists such attacks.
منابع مشابه
Correlations in RC 6
In this paper the block cipher RC6 is analysed. RC6 is submitted as a candidate for the Advanced Encryption Standard, it has 128-bit blocks and supports keys of 128, 192 and 256 bits, and is an iterated 20-round block cipher. Here it is shown that versions of RC6 with 128-bit blocks can be distinguished from a random permutation with up to 15 rounds; for some weak keys up to 17 rounds. Moreover...
متن کاملCorrelations in RC6 with a Reduced Number of Rounds
In this paper the block cipher RC6 is analysed. RC6 is submitted as a candidate for the Advanced Encryption Standard, and is one of five finalists. It has 128-bit blocks and supports keys of 128, 192 and 256 bits, and is an iterated 20-round block cipher. Here it is shown that versions of RC6 with 128-bit blocks can be distinguished from a random permutation with up to 15 rounds; for some weak ...
متن کاملBest Regards Lars Correlations in Rc6
In this paper the block cipher RC6 is analysed. RC6 is submitted as a candidate for the Advanced Encryption Standard, it has 128-bit blocks and supports keys of 128, 192 and 256 bits, and is an iterated 20-round block cipher. Here it is shown that versions of RC6 with 128-bit blocks can be distinguished from a random permutation with up to 15 rounds; for some weak keys up to 17 rounds. Moreover...
متن کاملImproving Integral Attacks Against Rijndael-256 Up to 9 Rounds
Rijndael is a block cipher designed by V. Rijmen and J. Daemen and it was chosen in its 128-bit block version as AES by the NIST in October 2000. Three key lengths 128, 192 or 256 bits are allowed. In the original contribution describing Rijndael [4], two other versions have been described: Rijndael-256 and Rijndael-192 that respectively use plaintext blocks of length 256 bits and 192 bits unde...
متن کاملالگوریتم کنترل نرخ بیت متغیر ویدئو در سطح گروه تصاویر برای استاندارد فشردهسازی H.265
A rate control algorithm at the group of picture (GOP) level is proposed in this paper for variable bit rate applications of the H.265/HEVC video coding standard with buffer constraint. Due to structural changes in the HEVC compared to the previous standards, new rate control algorithms are needed to be designed. In the proposed algorithm, quantization parameter (QP) of each GOP is obtained by ...
متن کامل