Improved meet-in-the-middle attack on reduced-round Kiasu-BC algorithm
Abstrak
Kiasu-BC algorithm is an internal tweakable block cipher of authenticated encryption algorithm Kiasu as one of first-round candidates in the CAESAR competition.The precomputation complexity is reduced by utilizing the freedom of the tweak and the internal key restriction through the research on structural characteristics of Kiasu-BC algorithm based on AES-128 round function.Combined with the differential enumeration technique, a new 5-round meet-in-the-middle distinguisher was constructed to improve the meet-in-the-middle attack on 8-round Kiasu-BC algorithm.The improved attack requires the time complexity of 2<sup>114</sup>, the memory complexity of 2<sup>63</sup> and the data complexity of 2<sup>108</sup>.
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Penulis (2)
Manman LI
Shaozhen CHEN
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