Problem 1a.

Using the original plaintext below in bold quotes (e.g. use only alphabet characters, a-z), write a program (in Matlab or python) to encrypt plaintext into ciphertext using the Hill cipher

If he had anything confidential to say, he wrote it in cipher, that is, by so changing the order of the letters of the alphabet, that not a word could be made out. Getting started:

Getting started:

1.Choose and use a 3 by 3 matrix representing the encryption key (Note: Make sure the matrix has an inverse.).

2.Iterate over each character of the plain text:

1.If the character is alphabet:

1.Calculate the position/index of the character in the 0-25 range.

2.Find the character at the new position.3.Replace the current letter by this new character.

2.Else, If the character is not alphabet, ignore the character, and move to the next position in the plaintext. with no change.

3.Your program is to print or graph results

Problem 1b

. Using the ciphertext you generated from Problem 3a, write a program to decrypt ciphertext into plaintext using the Hill cipher. Your program is to print or graph results