Digital Signature
Digital signatures use the AKC to implement the nonrepudiation (“nr”) feature;
that is, you can’t deny this message is not yours.
Digital Signature (make “nr”)
Requirement: Bob wants to assure that the message to his associates really comes from him.
1. Bob writes a message and encrypts it using his private key (he signs the message),
2. Bob sends the encrypted message to his associates over the Internet,
3. The associates receive and decrypt it using Bob’s public key.
4. The associates now can read the message.