Computer Network Security Methods
...algorithms. Data encryption standard (DES), triple DES, Advanced encryption standard (AES), International data encryption algorithm (IDEA), Blowfish, CAST-128 and RC-5 are examples of symmetric encryption, while RSA and Diffie-Hellman are algorithms that follow asymmetric encryption. A brief description of these algorithms is covered as under (Forouzan, Behrouz A., 943-954):-
DES and Triple DES
64-bit plain text blocks encryption using 64 bit key.
Consists of 16 complex round ciphers.
Each round is encrypted using different key, generated from original key by round key generator.