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中文摘要：
研究了轻量级分组密码算法MIBS抵抗相关密钥不可能差分的能力。利用MIBS-80密钥编排算法的性质，给出了一个密钥差分特征，并结合特殊明密文对的选取，构造了一个10轮不可能差分。在此不可能差分特征上进行扩展，对14轮的MIBS-80进行了攻击，并给出了复杂度分析。此攻击的结果需要的数据复杂度为254和时间复杂度为256。
英文摘要：
The strength of MIBS algorithm against the related-key impossible differential attack was examined. MIBS is a lightweight block cipher algorithm. By using the key-expanding properties of MIBS-80 algorithm, a related-key differ- ential feature was presented and a 10-round impossible differential method was constructed by combining special ci- pher-plaintexts. Based on the impossible differential method, an attack to 14-round MIBS-80 algorithm was given, and the attack complexity both on data and on time were gained. Analysis results indicate the attack to MIBS of 14 rounds MIBS-80 algorithm needs 254 chosen plaintext operations and 256 encrypting computations.
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