Des And | 3des

Rearranges the 64 bits of the input block.

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)

56-bit effective key length (plus 8 parity bits for a total of 64 bits). Block Size: 64 bits. Process Steps: DES and 3DES

Developed in the 1970s, DES was the global standard for decades before its 56-bit key became vulnerable to modern brute-force attacks.

Each of the 16 rounds involves expansion, XOR with a subkey, substitution (via S-boxes), and permutation. Rearranges the 64 bits of the input block

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.

The inverse of the initial permutation to produce the final ciphertext. 2. Triple DES (3DES) Process Steps: Developed in the 1970s, DES was

Uses a Feistel network consisting of 16 rounds of processing.