Energy Analysis of Public-Key Cryptography for Wireless Sensor Networks

In this paper, we quantify the energy cost of authentication and key exchange based on public-key cryptography on an 8-bit microcontroller platform. We present a comparison of two public-key algorithms, RSA and Elliptic Curve Cryptography (ECC), and consider mutual authentication and key exchange between two untrusted parties such as two nodes in a wireless sensor network. Our measurements on an Atmel ATmega128L low-power microcontroller indicate that public-key cryptography is very viable on 8-bit energyconstrained platforms even if implemented in software. We found ECC to have a significant advantage over RSA as it reduces computation time and also the amount of data transmitted and stored.

• Type: Conference
• Year: 2005
• Where: PERCOM
• Authors: Arvinderpal Wander, Nils Gura, Hans Eberle, Vipul Gupta, Sheueling Chang Shantz
• Keywords: 8-bit Microcontroller Platform, Elliptic Curve Cryptography, PERCOM 2005, Public-Key Cryptography, Wireless Networks