What is the reason that a digital signature can be used to provide the authenticity of digitally signed data?
A. Both the signer and the recipient must first agree on a shared secret key that is only known to both parties.
B. Both the signer and the recipient must first agree on the public/private key pair that is only known to both parties.
C. Only the signer has sole possession of the private key.
D. Only the recipient has a copy of the private key to decrypt the signature
