And 3des | Des

Uses a Feistel network consisting of 16 rounds of processing.

Each of the 16 rounds involves expansion, XOR with a subkey, substitution (via S-boxes), and permutation. DES and 3DES

Rearranges the 64 bits of the input block. Uses a Feistel network consisting of 16 rounds of processing

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. XOR with a subkey

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