What do S-boxes Say in Differential Side Channel Attacks?

Abstract

Cryptographic devices are vulnerable against the now wellknown side channel leakage analysis. Secret data, such as keys, can be revealed by attacks like DPA, DEMA, CPA. However, this kind of attacks also exhibits wrong keys, this phenomenon being known as the "ghost peaks" problem and has been briefly explained in CPA. We give here a comprehension and analysis of the ghost peak problem that occurs in di#erential analysis regarding to di#erent power consumption model and various weighting techniques.