DES( Data Encryption Standard)算法，于1977年得到美国政府的正式许可，是一种用56位密钥来加密64位数据的方法。虽然56位密钥的DES算法已经风光不在,而且常有用Des加密的明文被破译的报道,但是了解一下昔日美国的标准加密算法总是有益的,而且目前DES算法得到了广泛的应用,在某些场合,她仍然发挥着余热^_^.-DES (Data Encryption Standard) algorithm, in 1977 the United States government' s official permission, is a 56-bit key used to encrypt 64-bit data. Although the 56 keys of the DES algorithm has been scenery is not, and often with Des be deciphered plaintext encrypted reported, but look past the U.S. standard encryption algorithm always useful, and the current DES algorithm has been widely used, in some some occasions, she still plays heat ^ _ ^.