Each of the 16 rounds involves expansion, XOR with a subkey, substitution (via S-boxes), and permutation.
The inverse of the initial permutation to produce the final ciphertext. 2. Triple DES (3DES) DES and 3DES
Rearranges the 64 bits of the input block. Each of the 16 rounds involves expansion, XOR
Uses a Feistel network consisting of 16 rounds of processing. XOR with a subkey
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)
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.