56-bit effective key length (plus 8 parity bits for a total of 64 bits). Block Size: 64 bits. Process Steps:
The inverse of the initial permutation to produce the final ciphertext. 2. Triple DES (3DES) 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. 56-bit effective key length (plus 8 parity bits