New results in biclique cryptanalysis of full round GIFT
K.B. Jithendra, Shahana Thottathikkulam Kassim · Journal of Intelligent & Fuzzy Systems · 2021
Security of a recently proposed bitwise block cipher GIFT is evaluated in this paper. In order to mount full round attacks on the cipher, biclique cryptanalysis method is applied. Both variants of the block cipher are attacked using Independent biclique approach. For recovering the secret keys of GIFT-64, the proposed attack requires 2 127.45 full GIFT-64 encryption and 2 8 chosen plain texts. For recovering the secret keys of GIFT-128, the proposed attack requires 2 127.82 full GIFT-128 encryption and 2 18 chosen plain texts. The attack complexity is compared with that of other attacks proposed previously. The security level of GIFT is also compared with that of the parent block cipher PRESENT, based on the analysis.