program讲解、辅导 Java设计程序

Implement a simple Feistel encryptor and decryptor
Notes:

This can be implemented using a programming language of Java. Follow the same
procedure for below plaintexts, round functions and/or subkeys as stated under each part.

Part – A
a) Implement the encryptor for a Feistel network with the following parameters.

Plaintext: password
Number of Rounds: 2

b) Decrypt the resulting ciphertext and verify that you can obtain the original plaintext.

Part – B
a) Implement the encryptor for a Feistel network with the following parameters.
Number of Rounds & Subkeys: 2 rounds, K1
= 0xA56B, K2
= 0xEF23

b) Decrypt the resulting ciphertext and verify that you can obtain the original plaintext.

Part – C
a) Implement the encryptor for a Feistel network with the following parameters.

Plaintext: 1100101101011001
Round Function: defined as follows.
 First letter goes to the second place.
 Second letter goes to the third place.
 Third letter goes to the fourth place.
 Fourth letter comes to the first place.
Number of Rounds: 2

b) Decrypt the resulting ciphertext and verify that you can obtain the original plaintext.

program讲解 、辅导 Java设计程序

program讲解、辅导 Java设计程序