The master secret is used to create which are symmetric keys to encrypt and decrypt information exchanged during the session and to verify its integrity.

Session keys

Explanation: Session keys are the keys that perform the encryption and decryption feature in the form of key for the security purpose.This keys works during the time of the session when the exchange of information is going on between two user computers. It works that the session does have to face any security issue like loss of data, stealing of data etc.It is also known by the name of symmetric keys.

in its most general sense, a fair use is any copying of copyrighted material done for a limited and “transformative” purpose, such as to comment upon, criticize, or parody a copyrighted work. such uses can be done without permission from the copyright owner.apr 4, 2013