Cryptology ePrint Archive: Report 2005/311

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

Cecile Canovas and Jessy Clediere

Abstract: Cryptographic devices are vulnerable against the now well-known 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 differential analysis regarding to different power consumption model and various weighting techniques.

Category / Keywords: secret-key cryptography / side channel, differential power analysis, DPA, DEMA, CPA, DES, S-box, correlation, ghost peaks

Date: received 5 Sep 2005, last revised 21 Dec 2005

Contact author: cecile canovas at cea fr

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Version: 20051221:141210 (All versions of this report)

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