An Effective Differential Fault Analysis on the Serpent Cryptosystem in the Internet of Things

作者：Li Wei; Tao Zhi; Gu Dawu; Sun Li^*; Qu Bo; Liu Zhiqiang; Liu Ya

来源：China Communications, 2014, 11(6): 129-139.

DOI：10.1109/cc.2014.6879011

• internet of things
• cryptanalysis
• differential fault analysis
• serpent

Due to the strong attacking ability, fast speed, simple implementation and other characteristics, differential fault analysis has become an important method to evaluate the security of cryptosystem in the Internet of Things. As one of the AES finalists, the Serpent is a 128-bit Substitution-Permutation Network (SPN) cryptosystem. It has 32 rounds with the variable key length between 0 and 256 bits, which is flexible to provide security in the Internet of Things. On the basis of the byte-oriented model and the differential analysis, we propose an effective differential fault attack on the Serpent cryptosystem. Mathematical analysis and simulating experiment show that the attack could recover its secret key by introducing 48 faulty ciphertexts. The result in this study describes that the Serpent is vulnerable to differential fault analysis in detail. It will be beneficial to the analysis of the same type of other iterated crypto systems.

• 出版日期2014-6
• 单位上海交通大学; 上海理工大学; 中国科学院信息工程研究所; 东华大学