用分组密码加密体制，实现DES加密解码的算法。-Block cipher encryption system, DES encryption decoding algorithm.

square音频刷卡器解码算法，乐刷第一代音频刷卡器手机解码算法.如有需要，可以提供android手机端解码DEMO程序，QQ:16700612-The decoding algorithm for Square s audio mobile magnetic-card reader , The decoding algorithm for the first generation magnetic card reader of leshua company