Cryptanalysis of Full-Round Magpie Block Cipher

Magpie is a lightweight block cipher proposed by Li et al. in Acta Electronica Sinica volumn 45, issue 10. It adopts an substitution-permutation network (SPN) structure with size of 64 bits and the key 96 bits, respectively. To achieve consistency encryption decryption, which both hardware software friendly, 16 are used as control signals to select S-boxes another determine order operations. As designers claimed, security might be improved different keys generate ciphers. This paper analyzes Magpie, studies difference propagation finally finds that has set 2 80 weak makes full-round weak, corrects lower bound number active 10 instead 25 designers. In model, reduced claimed only $4\times 2^{16}$ .