Consider the following 4-message protocol:A → S: (B, {(A, K1)}KpbS)S → B: AB → S: (A, {(B, K2)}KpbS)S → A: (B, {K2}K1)Which of the following statements is true, at the end of the protocol, and with regards to the purpose of the protocol:a) Both A and B establish a session key K2, and B is sure of A’s identity b) Both A and B establish a session key K1, and B is sure of A’s identityc) Both A and B establish a session key K1, and A is sure of B’s identityd) Both A and B establish a session key K1, and both B and A are sure of each other’s identitye) Both A and B establish a session key K2, and A is sure of B’s identityf) Both A and B establish a session key K1g) Both A and B establish a session key K2h) Both A and B authenticate each other by knowing each other’s identitiesi) A ends up knowing B’s identityj) B ends up knowing A’s identityk) None of the abovel) All of the above

A protocol is a set of rules or guidelines that dictate the behavior of entities in a communication…

Answered: Consider the following 4-message…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Consider the following 4-message protocol:

A → S: (B, {(A, K1)}KpbS)
S → B: A
B → S: (A, {(B, K2)}KpbS)
S → A: (B, {K2}K1)

Which of the following statements is true, at the end of the protocol, and with regards to the purpose of the protocol:

a) Both A and B establish a session key K2, and B is sure of A’s identity
b) Both A and B establish a session key K1, and B is sure of A’s identity
c) Both A and B establish a session key K1, and A is sure of B’s identity
d) Both A and B establish a session key K1, and both B and A are sure of each other’s identity
e) Both A and B establish a session key K2, and A is sure of B’s identity
f) Both A and B establish a session key K1
g) Both A and B establish a session key K2
h) Both A and B authenticate each other by knowing each other’s identities
i) A ends up knowing B’s identity
j) B ends up knowing A’s identity
k) None of the above
l) All of the above

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