简短准确的DES算法源程序，使用51汇编，注释详尽，易懂，可直接嵌入程序中。已在某RFID产品中大量生产应用。-Brief and accurate source of the DES algorithm, the use of the 51 assembly, detailed annotations, easy to understand, can be directly embedded in the program. Mass production in a RFID products.