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A Study of Two Algorithms Based on Feistel Cipher in Wireless Medical Sensor Networks

Wireless sensor networks can be widely used in the area of healthcare monitoring. For system designers, it’s a very important factor to consider about how to protect patient’s privacy when building such a wireless sensor network for remote wireless healthcare monitoring. After studying and analyzing the features of Feistel cipher structure and DES,two new algorithms are proposed and implemented as the names of SF_noSBox and SF_SBox in this paper. The two new algorithms are compared with DES in running time,security,RAM and ROM space; and efficiently used for encrypting or decrypting sensitive medical data. Experiment result shows that the new ones take a good tradeoff in resources consume and system security.