DATA DEPENDENT AUTHENTICATION KEYS FOR DIFFERENTIAL POWER ANALYSIS RESISTANT AUTHENTICATION

A system and method for using mixing functions to generate and manipulate authentication keys based on the data being decrypted to mitigate the effect of side channel attacks based on differential power analysis (DPA). The mixing function may be based on a XOR tree, substitution-permutation networks, or double-mix Feistel networks. The mixing function uses some secret key material, which diversifies its behavior between different instantiations.