Master key and session key

Question

Specify some of the difference between master key and session key?

Answer 1

Session key:

a) Communication between end systems is encrypted by using the temporary key, generally known as the session key.

b) The session key is used for duration of the logical connection, like the frame relay connection or transport connection, and then it is discarded.

Master key:

a) Session keys are broadcasted within the encrypted form, by using the master key which is shared by keys distribution center and an end system.

b) For each end system or user, there exists a unique master key which it shares along with the key distribution center. These master keys should be distributed in some fashion.