Introduction - If you have any usage issues, please Google them yourself
The symmetric cryptosystem in the DES algorithm for the password system, has been became the data encryption standard, was developed by the United States in 1972 IBM symmetric cryptosystem encryption algorithm. Its key length is 56, expressly groups, according to a 64 - bit will clear after the grouping and 56 set of keys according to a replacement or exchange method to form cipher group encryption method