A Study of Developing a Prediction Method of Security of Cryptographic Devices against Side-Channel Attacks Based on Information Leakage Potential

2015 Fiscal Year Final Research Report

• Project/Area Number: 26870392
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Communication/Network engineering; Information security
• Research Institution: Okayama University
• Principal Investigator: Iokibe Kengo 岡山大学, 自然科学研究科, 助教 (10420499)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: 情報セキュリティ / 暗号・セキュリティ / 耐タンパー技術 / AES暗号 / 等価回路モデル

Outline of Final Research Achievements

Aiming for developing a method to predict security of cryptographic devices against side-channel attacks that is a new cryptanalytic method using physical behavior of the devices, we firstly confirmed that strength of side-channel information leakage can be simulated with an equivalent circuit model of an integrated circuit (IC) implementing a cryptographic circuit. Next, we indicated that the behavior of the cryptographic IC leaking the side-channel information can be seen in the equivalent circuit model. This can help develop a new and more efficient countermeasures to the attacks. Finally, we identified signal-to-noise ratios of side-channel traces as an information leakage potential to be used in prediction of side-channel attack security.

Free Research Field

環境電磁工学, 暗号回路のハードウェアセキュリティ