Correlation power analysis attack on software implementation of TRIVIUM stream cipher

Abstract

Power analysis attacks are a category of attacks against cryptographic implementations. In this case, the power consumption of a cryptosystem is analysed to extract its secret values such as secret keys and key streams. This has become a huge threat to modern day cryptosystems. Therefore, identifying cryptographic implementations which are vulnerable to power analysis attacks is very important. Many studies have been carried out on power analysis attacks on block cipher implementations, but relatively less number of studies have been carried out on power analysis attacks on stream cipher implementations. This paper presents a power analysis attack on a software implementation of TRIVIUM stream cipher. In order to analyse the power consumption, correlation power analysis (CPA) is done, and the keystream is successfully recovered.