Question

In the Key generation procedure, the Encryption key from the server to client is represented as:

(a) HASH(K||H||”C”||session_id)

(b) HASH(K||H||”B”||session_id)

(c) HASH(K||H||”F”||session_id)

(d) HASH(K||H||”D”||session_id)

I had been asked this question in final exam.

This is a very interesting question from Secure Shell(SSH) topic in portion Internet Protocol, Network Addressing and Transport Level Security of Cryptograph & Network Security

Answer 1

Right option is (d) HASH(K||H||”D”||session_id)

To explain I would say: The Initialization Vector from the server to client is given by HASH(K||H||”D”||session_id).