Data Encryption with 64-bit Blocks Quiz

To provide a simple way to reverse the encryption process during decryption

To increase the diffusion of the plaintext across the ciphertext (correct)

To ensure that the same plaintext blocks do not produce the same ciphertext blocks

To generate the initial key for the encryption process

1111000010101010111100001010101011001100000000001100110011111111

1100110011111111110000001010101011110000101010101100110000000000

0000000111111111000000001111111111110000101010101111000010101010

1100110000000000110011001111111111110000101010101111000010101010 (correct)

To perform a simple substitution cipher on the plaintext block

To provide multiple layers of substitution and permutation operations on the plaintext block (correct)

To generate the key schedule for the encryption process

To ensure that the encryption process is reversible during decryption

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