本程序是一个在Linux FC5环境下写的经典加密程序playfair加密程序。也可以在其他环境中运行。只有文本界面-this procedure is in a Linux environment FC5 write classical encryption to encrypt playfair procedures. Also in other operating environments. Only text interface

linux C写的3DES及DES加密算法函数源程序，程序格式工整 易于理解 -C write function 3DES and DES encryption algorithm