A Security Analysis of IoT Encryption : Side Channel Cube Attack on SIMECK32/64

Alya Geogiana Buja1,2, Shekh Faisal Abdul-Latip1 and Rabiah Ahmad1 1 

 INSFORNET, Center for Advanced Computing Technology, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, Durian Tunggal, 76100 Melaka, Malaysia 

2 Universiti Teknologi MARA, Shah Alam, 40450 Selangor, Malaysia 

ABSTRACT

 Simeck, a lightweight block cipher has been proposed to be one of the encryption that can be employed in the Internet of Things (IoT) applications. Therefore, this paper presents the security of the Simeck32/64 block cipher against side-channel cube attack. We exhibit our attack against Simeck32/64 using the Hamming weight leakage assumption to extract linearly independent equations in key bits. We have been able to find 32 linearly independent equations in 32 key variables by only considering the second bit from the LSB of the Hamming weight leakage of the internal state on the fourth round of the cipher. This enables our attack to improve previous attacks on Simeck32/64 within side-channel attack model with better time and data complexity of 235 and 211.29 respectively. 

KEYWORDS

 Block Cipher, IoT, Lightweight Encryption, Security Analysis, Simeck 

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