This paper proposes multi-key encryption scheme and engine architecture (MKE) that increases security and optimizes energy efficiency of sensor networks, while minimizing modifications to existing implementations. The scheme improves security of AES against correlation power analysis (CPA) attack by employing MKE engine, breaking the correlation between power consumption and the used key. Other schemes utilize complex hardware designs, for example by using the inhomogeneous s-boxes that reduce energy efficiency of the engine. In contrast, the proposed hardware engine uses a randomly sequence of few keys to encode subsequent blocks of a messages. Additionally, the scheme improves security of AES against brute-force attacks for a given key size by utilizing multiple keys to encrypt subsequent blocks of a message. In contrast, a typical security upgrade would require a larger key size and encryption engine, which would increase cost and energy consumption of the devices. Both analytical and simulation results are presented in this paper.
S. Kolli and M. J. Zawodniok, "Energy-Efficient Multi-Key Security Scheme for Wireless Sensor Network," Proceedings of the 34th IEEE Conference on Local Computer Networks, 2009, Institute of Electrical and Electronics Engineers (IEEE), Oct 2009.
The definitive version is available at http://dx.doi.org/10.1109/LCN.2009.5355043
34th IEEE Conference on Local Computer Networks, 2009
Electrical and Computer Engineering
Keywords and Phrases
Advanced Encryption Standard (AES); Correlation Power Analysis (CPA); Key Pre-Distribution; Wireless sensor networks
Article - Conference proceedings
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