In one round of DES encryption algorithm, the complex function ‘F’ produces an output of length______ bitsa.64b.32c.57d.48

Break Down the Problem

1. Identify the length of the output produced by the function ‘F’ in the DES encryption algorithm.

Relevant Concepts

2. The Data Encryption Standard (DES) is a symmetric-key algorithm that processes data in blocks of 64 bits. The algorithm consists of several rounds, and in each round, the function ‘F’ is applied.

Analysis and Detail

3. In DES, the function ‘F’ takes a 32-bit half of the input along with a 48-bit key and produces an output of 32 bits.

Verify and Summarize

4. Thus, in each round of DES encryption, the function ‘F’ generates an output of 32 bits.

Final Answer

The output of the complex function ‘F’ in one round of DES encryption algorithm is 32 bits (Option b).