Question 1

If John wants to send an encrypted message to Jane using a public key cryptosystem, which key does John use to encrypt the message?

John's Private Key

Jane's Private Key

Jane's Public Key

Question 2

John wants to digitally sign a message he's sending to Jane so that Jane can be sure the message came from him without modification while in transit. Which key should he use to encrypt the message?

Jane's Public Key

Jane's Private Key

John's Private Key

Question 3

At which layer of the OSI model does the IPSec protocol function?

Network

Session

Data Link