Suppose that Bob receives Alice's digital certificate from someone claiming to be Alice. a. Before Bob verifies the signature on the certificate, what does he know about the identity of the sender of...

Suppose that Bob receives Alice's digital certificate from someone claiming to be Alice.

a. Before Bob verifies the signature on the certificate, what does he know about the identity of the sender of the certificate?

b. How does Bob verify the signature on the certificate and what useful information does Bob gain by verifying the signature?

c. After Bob verifies the signature on the certificate, what does he know about the identity of the sender of the certificate?