Stream Ciphers on Wireless Sensor Networks

According to the network security problem of the wireless sensor networks, there are several severe challenges, such as limited processing power, storage, bandwidth, and energy. The stream cipher to be suitable for wireless sensor networks is proposed. And it composed of a 128-length linear feedback shift register (LFSR) and an 11-variable boolean function. The stream cipher algorithm is written with 8051 assembly code, and compared with the RC5 and A5. Through the comparison, the efficiency is satisfied. The code size of the stream cipher used in the wireless sensor networks is 578 bytes and the execution time is 0.024642 second and it faster than RC5 and A5 and uses less code size. Then the statistic testing and the known attack methods are used to test the security of the designed stream cipher. And the results can prove that its security is very high and suitable for wireless sensor networks.