Message Digest has many applications among which are Encryption &
Message Authentication.
In this assignment use sha1 to
decrypt & authenticate a message M.
I have used a password P to generate a onetime pad of the same size as M and
xored with M to produce M.cipher.
Use the following files to read the message M:
1. P.base64 is the encryption of P
using cs772PublicKey.pem
2. M.base64 is the base64
encoding of M.cipher.
Which of the following is the correct base64 encoding of the message digest of P|M|P :
a) MAC1.base64
b) MAC2.base64