Question: Consider the following authentication protocol. R is the challenge sent by Bob to Alice, and KAB is the secret Alice and Bob share. Which of

Consider the following authentication protocol. R is the challenge sent by Bob to Alice, and KAB is the secret Alice and Bob share. Which of the following are secure for a session key? When answering this question, for each option, think about the three aspects:

.

Can Trudy impersonate Alice to Bob?

.

Can this session key be securely used to encrypt messages exchanged between Alice and Bob?

.

If this session key happened to be known by Trudy, can Trudy find KAB?

To get full credit, for the options that are not secure

,

briefly explain why it is not secure

,

you can explain by giving a case where an attacker can compromise the communication.

.

KAB XOR R

. {

KAB

+

}

KAB

. {

}

+

KAB

. {

KAB

}

KAB

. {

}

KAB

. {

KAB

}

Consider the following authentication protocol. R is the challenge sent by

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Databases Questions!

1 . Suppose there are 1 0 0 0 users, and an attacker has a dictionary of 5 0 0 0 common passwords. An attacker has stolen the database of hashed passwords. a . If the users password in the database...

Consider the following authentication protocol SKID2/SKID3 that uses symmetric cryptography. It assumes that Alice and Bob share a secret key K . SKID2 allows Bob to authenticate to Alice and...

please provide correct solution. Suppose we use the following authentication protocol for the server Bob to authenticate a user Alice. Alice initiates contact with Bob. Suppose we wish Bob to be a...

In section 9.6 Eavesdropping and Server Database Reading it was asserted that t is extremely difficult, without public key cryptography, to have an authentication scheme which protects against both...

( 1 0 POINTS ) Consider the following authentication protocol, which uses a classical cryptosystem. Alice generates a random message r , enciphers it with the key k she shares with Bob, and sends the...

1. (10 pts) In section 6.4.2 of Network Security: Private Communication in a Public World, Second Edition, Defenses Against Man-in-the-Middle Attack, it states that encrypting the Diffie-Hellman...

Walsh Company purchased $65,000, 10%, three-year bonds for $68,407.39. Interest on the bonds is payable semiannually. Using straight-line amortization of the bond premiums, make the necessary journal...

MULTIPLE-CHOICE QUESTIONS 1. Which of the following statements best describes what is meant by the term appropriateness of audit evidence? a. Appropriateness is a measure of the quality of audit...

WHAT IS NET PROFIT MARGIN FOR 2021?Sales (Net) 26,914.000Cost of Goods Sold 8,265.000Selling, General, and Administrative Expense 7,434.000Operating Income Before Depreciation 11,215.000Depreciation...

You have the following information for Whispering Winds Inc. for the month ended October 31, 2022. Whispering Winds uses a periodic method for inventory. You have the following information for...

4 How the market system adjusts to change and promotes progress.

5. Cite three examples of recent decisions that you made in which you, at least implicitly, weighed marginal cost and marginal benefit. LO1

4. What is meant by the term utility, and how does it relate to purposeful behavior? LO1