Differential Fault Attack on Decim~(v2)
Chen Ha · Journal of Chinese Computer Systems · 2015
According to the drawbacks of the existing fault attacks against Decivmv2,an improved fault attack is proposed,which gets fault locations and builds linear equations of Decivmv2 internal states to figure them out by making full use of the differential properties of the nonlinear Boolean functions. Experimental results show that the attack can recover the whole 80-bit initial key of Decivmv2 by only 2 fault injections and 144 bits keystreams averagely,the time complexity was reduced evidently from O( 242. 5) to O( 238. 95). Our attack can provide some ideas on other stream cipher.