An efficient implementation of RC4 cipher for encrypting multimedia files on mobile devices
Proceedings of the 2007 ACM symposium on Applied computing
Energy evaluation of software implementations of block ciphers under memory constraints
Proceedings of the conference on Design, automation and test in Europe
A study of the performance of SSL on PDAs
INFOCOM'09 Proceedings of the 28th IEEE international conference on Computer Communications Workshops
Energy-efficient software implementation of long integer modular arithmetic
CHES'05 Proceedings of the 7th international conference on Cryptographic hardware and embedded systems
An empirical energy model for secure Web browsing over mobile devices
Security and Communication Networks
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Encryption algorithms can be used to help secure wireless communications, but securing data also consumes resources. The goal of this research is to provide users or system developers of personal digital assistants and applications with the associated time and energy costs of using specific encryption algorithms. Four block ciphers (RC2, Blowfish, XTEA, and AES) were considered. The experiments included encryption and decryption tasks with different cipher and file size combinations. The resource impact of the block ciphers were evaluated using the latency, throughput, energy-latency product, and throughput/energy ratio metrics. We found that RC2 encrypts faster and uses less energy than XTEA, followed by AES. The Blowfish cipher is a fast encryption algorithm, but the size of the plain-text affects its encryption speed and energy consumption. Faster algorithms seem to be more energy efficient because of differences in speed rather than differences in power consumption levels while encrypting.