Electromagnetic Side-channel Attacks Research Articles

Influence of PCB and Attached Line of Hardware on Electromagnetic (EM) Information Leakage

Electromagnetic (EM) radiation from information hardware under normal operating conditions can compromise secret information (EM information leakage), for example, operations or processed data contained in the hardware. Methods for analyzing EM radiation with the intention of extracting secret information have been proposed, and EM side-channel attacks on cryptographic hardware are a major concern. This paper investigates how EM information leakage changes with the configuration of information hardware, focusing on the frequency characteristics of the hardware. We assume that frequency characteristics of the EM radiation correspond to physical aspects of the hardware configuration. To address the issue of information leakage, this paper presents a novel analysis of EM radiation from information hardware by using a model circuit board. Through this model we show that the intensity of EM emission can be related to the layout of the hardware.

Differential electromagnetic analysis on advanced encryption standard (AES)

To study the vulnerability of Advanced Encryption Standard (AES) against electromagnetic side channel attacks,the article analyzed the electromagnetic information leakage model of microcomputer and the choice of D function. Then,concerning the AES-128 bits cryptographic system realized by the 89C51 microchip,Differential Electromagnetic Analysis (DEMA) algorithm,which was used into an attack experiment and succeeded in obtaining 128 bits secret key of AES-128,was described. After analyzing the experimental results,the leakage of secret information produced by ByteSub transformation was detected. This method can be regarded as a new protective measure in cryptographic systems.