Answer:
True
Step-by-step explanation:
A Feistel cipher is a symmetric-key cryptographic structure that uses the same algorithm for both encryption and decryption, and it uses a simple sub-algorithm called a round function. The round function is applied to half of the block of plaintext or ciphertext, and the output is combined with the other half using a mathematical operation. The resulting block is then swapped and the process is repeated for a fixed number of rounds.
The fact that the encryption and decryption algorithms are the same, and that the round function is invertible. Therefore, the same hardware or software can be used for both encryption and decryption in a Feistel cipher.