RAIN is a lightweight block cipher with SPN structure,which not only has strong security,but also possesses high software and hardware implementation efficiency.Meet-in-the-middle attacks are widely used in the security analysis of block ciphers algorithms.In this paper,the meet-in-the-middle attack on RAIN is researched.By examining the structural characteristics and the properties of truncated differential of RAIN-128,both 4-round and 6-round meet-in-the-middle distinguishers are first constructed by using differential enumeration technique,and meet-in-the-middle attacks on 8-round and 10-round RAIN-128 are presented,respectively.For 8-round attack,in the preprocessing,the time complexity is2688-round encryptions,and the memory complexity is275bit,in the online,the time complexity is21098-round encryptions,and the data complexity is272chosen plaintexts.For 10-round attack,in the preprocessing,the time complexity is221410-round encryptions,and the memory complexity is2219bit,in the online,the time complexity is210910-round encryptions,and the data complexity is272chosen plaintexts.The result shows that RAIN-128 can be against meet-in-the-middle attack and has high security redundancy.
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维普
