Summary
International Symposium on Electromagnetic Compatibility
2014
Session Number:14P2-A
Session:
Number:14P2-A5
Chosen-message Electromagnetic Analysis against Cryptographic Software on Embedded OS
Hajime Uno, Sho Endo, Yu-ichi Hayashi, Naofumi Homma, Takafumi Aoki,
pp.-
Publication Date:2014/05/12
Online ISSN:2188-5079
Summary:
This paper presents an EMA (electromagnetic analysis) against an RSA software on an embedded operating system (OS) and its countermeasure. First, we describe a pre-processing step to find an appropriate observation point for EMA, where the EM radiation caused by cryptographic operations can be observed in an accurate manner. We employ a specific input pattern, which is suitable for observing EM radiation according to an EM radiation model, and scan a micro EM probe on the target device in order to find specific EM radiation pattern for EMA. This pre-processing can be conducted on another programmable device that has the same CPU and OS as the target device. We demonstrate that such EM analysis is effective for an RSA software performed on Android OS. We also confirm the validity of a countermeasure against the presented attack.