Each of the 16 rounds involves expansion, XOR with a subkey, substitution (via S-boxes), and permutation.
3DES was introduced to extend the life of DES by applying the algorithm three times to each data block, significantly increasing the effective key length to combat brute-force attacks. DES and 3DES
The inverse of the initial permutation to produce the final ciphertext. 2. Triple DES (3DES) Each of the 16 rounds involves expansion, XOR
56-bit effective key length (plus 8 parity bits for a total of 64 bits). Block Size: 64 bits. Process Steps: XOR with a subkey
Uses a Feistel network consisting of 16 rounds of processing.
This guide covers the and its more secure successor, Triple DES (3DES) . Both are symmetric-key block ciphers that encrypt data in 64-bit blocks. 1. Data Encryption Standard (DES)