Beyond the Limits of DPA: Combined Side-Channel Collision Attacks

作者：Bogdanov Andrey^*; Kizhvatov Ilya

来源：IEEE Transactions on Computers, 2012, 61(8): 1153-1164.

DOI：10.1109/TC.2011.140

• Analysis of algorithms and problem complexity
• data encryption
• cryptographic implementations
• physical security
• side-channel analysis
• collision attacks
• AES

The problem of extracting the highest possible amount of key-related information using the lowest possible number of measurements is one of the central questions in side-channel attacks against embedded implementations of cryptographic algorithms. To address it, this work proposes a novel framework enhancing side-channel collision attacks with divide-and-conquer attacks such as differential power analysis (DPA). An information-theoretical metric is introduced for the evaluation of collision detection efficiency. Improved methods of dimension reduction for side-channel traces are developed based on a statistical model of euclidean distance. Experimental results confirm that DPA-combined collision attacks are superior to both DPA-only and collision-only attacks. The new methods of dimension reduction lead to further complexity improvements. All attacks are treated for the case of AES-128 and are practically validated on a widespread 8-bit RISC microcontroller.

• 出版日期2012-8