2.  

TLS is one of the popularly used security protocols on the internet. a) What does TLS stand for and what does it replace? [2] b) The use of TLS relies on both symmetric and asymmetric cryptography. Why was it deemed ideal to not simply use one type of cryptography? c) Briefly outline the steps of TLS handshake. d) Diffie-Hellman (D-H) key exchange algorithm is used in TLS. i. Briefly explain how D-H algorithm works with an example. ii. Discuss at least two limitations of D-H. [4] [4] [6] [4] Activate Windows