стандарт шифрования данных(реализует блочный шифр, получаемый путём сдвига и замены данных, этот стандарт используется во всех федеральных правительственных учреждениях, во многих банках и системах для проведения денежных операций, разработан Национальным бюро стандартов США)
DES(An encryption algorithm that uses a 56-bit key and maps a 64-bit input block to a 64-bit output block. The key appears to be a 64-bit key, but one bit in each of the eight bytes is used for odd parity, resulting in 56 bits of usable key)
An algorithm for encoding binary data(It is a secret key cryptosystem published by the National Bureau of Standards (NBS), the predecessor of the US National Institute of Standards and Technology (NIST). DES and its variants has been replaced by the Advanced Encryption Standard (AES))
Data Encryption Standard An encryption algorithm that uses a 56-bit key and maps a 64-bit input block to a 64-bit output block. The key appears to be a 64-bit key, but one bit in each of the eight bytes is used for odd parity, resulting in 56 bits of usable key
