Learn about the Data Encryption Standard (DES) algorithm, its variations, and implementation in this comprehensive network security video tutorial. Explore the fundamentals of DES, including its 64-bit block cipher structure, 56-bit key length, and 16-round process. Understand the core concepts of substitution (confusion) and transposition (diffusion) that form the basis of DES. Dive into the types of DES, including Double DES and Triple DES with both 3-key and 2-key variations. Follow along as the tutorial covers initial permutation, key transformation, P-box permutation, final permutation, and decryption processes. Gain valuable insights into this widely studied encryption algorithm, essential for Computer Science and Information Technology students.