A New Differential Fault Attack on SPN Structure, with Application to AES Cipher

Abstract

The Substitution-Permutation Network (SPN) is a main type of structure in block ciphers. This paper proposes a new and practical differential fault attack technique on SPN structure. As an instance of SPN cipher , AES-256 can be recovered by 4 faulty ciphertexts. Compared with the previous techniques, our work can recover all subkeys of a n SPN cipher with all key s izes. Therefore , our attacking method on AES not only improves the efficiency of fault injection, but also decreases the number of faulty ciphertexts. It provides a new approach for fault analysis on block ciphers.