Question

MATLAB

Please help with encryption.

Then main program should then call a function encrypt message which should

• take in the message to encrypt and the keyword

• subtract 'a' from each element of the message (so the letter a is now 0)

• subtract 'a' from each element of the keyword

• encrypt the message using the keyword as described above (hint: first handle the letters encrypted using k0, then those encrypted using k1, etc)

• add 'a' to each element of the encrypted message (so it uses proper ASCII) • return the encrypted message

Enter a message in lower case with no spaces to encrypt: programmingisfun

Enter a length-5 keyword in lower case: maths

The encrypted message is: brhnjmmfpfsilmmz

The decrypted message is: programmingisfun

Answer 1

Main function:

Encrypt function:

Decrypt Function:

OUTPUT