Task $1($Encryption and Decryption$)$

Task $1$ objective

Encrypt and decrypt using an XOR logical operator.

Encrypting a message

Select a secret "one English word" message. Keep it secret.

Create a secret $$one English word$$ key. For simplicity, use the same length of the word key as the message. For example, if the message is "Hello," select a key size equal to $5$ characters, such as "March."

Apply XOR bitwise operation between the message and the key.

Decrypting a message

Use the "encrypted message" and the "secret key" and perform the bitwise XOR operation.

Verify that the decrypted message is the same as the "plain text".

Output to display

The output should be saved in a text file $($output$.$txt$).$ For example:

Plain text: HELLO

Key: world

Encrypted text: $?*>+$

Decrypted text: HELLO

The plain text and key are case sensitive$.$ The encrypted text should display the result in printable ASCII characters. If you notice that there is a nonprintable character right after $\text{'}>\text{'},$ which is a space. The XOR of $\text{'}$L$\text{'}$ and $\text{'}$l$\text{'}$ comes out to be $32$ in decimal which corresponds to a space in ASCII.