Problem
1. Bob receives a PGP message. How can he find out the type of the packet if the tag value is
a. 8
b. 9
c. 2
2. In PGP, can an e-mail message use two different public-key algorithms for encryption and signing? How is this defined in a message sent from Alice to Bob?
3. Answer the following questions about tag values in PGP:
a. Can a packet with a tag value of I contain another packet?
b. Can a packet with a tag value of 6 contain another packet?