Differential Fault Analysis of FOX Algorithm
Zhao Zheng-yang · Communications technology · 2010
FOX algorithm is the block cipher applied to the European Cable TV, which is based on a Lai-Massey scheme with the round function of SPS structure. FOX has a typical designed structure and is widely used in practice. However, there is seldom published paper on its security. In this paper, the strength of FOX against the differential fault analysis is examined, and with reference to the attack by differential fault analysis, a byte-oriented fault model is proposed. The experiment result shows that FOX is vulnerable to differential fault analysis. The result of attack experiment verifies this fact too. 128 faulty ciphertexts on average is required to recover the whole keys information, with an exhaustive calculation amount of O(2 15 ).