Question: Write a program in MATLAB that can encrypt and decrypt using S-DES (simplified DES). Test data: Use plaintext, ciphertext and the key (See below). Put

Write a program in MATLAB that can encrypt and decrypt using S-DES (simplified DES).

Test data: Use plaintext, ciphertext and the key (See below). Put comments on your program script.

** Using S-DES, decrypt the string (10100010) using the key (0111111101) by hand. Show intermediate results after each function (IP,FK,SW,FK,IP-1 ). Then decode the first 4 bits of the plaintext string to a letter and the second 4 bits to another letter where we encode A through P in base 2 (i.e., A = 0000, B = 0001, ..., P = 1111). Hint: As a midway check, after the application of SW, the string should be (00010011).

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