Question: Consider the authentication protocol below, which is based on knowl- edge of a shared 4-digit PIN number. Here, PIN = H(PIN, R A , R

Consider the authentication protocol below, which is based on knowl- edge of a shared 4-digit PIN number. Here, PIN = H(PIN, RA, RB).

a. Suppose that Trudy passively observes one iteration of the protocol. Can she determine the 4-digit PIN number? Justify your answer.

b. Suppose that the PIN number is replaced by a 256-bit shared symmetric key. Is the protocol secure? Why or why not?

Consider the authentication protocol below, which is based on knowl- edge of

I'm Alice, RA E (Bob, RA,KPIN), RB Alice E(Alice,RB,KPIN) Bob PIN PIN

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!

Q:

1. You have a Windows computer running Oracle VM VirtualBox, which is running Kali Linux, CentOS, and Ubuntu. What type of virtualization are you using? A. VM sprawl B. Type II hypervisor ...

Q:

(18pt) Suppose that Alice and Bob share a 4-digit PIN number, X. To establish a shared symmetric key, Bob proposes the following protocol: Bob will generate a random key K that he will encrypt using...

Q:

9. (18pt) Suppose that Alice and Bob share a 4-digit PIN number, X. To establish a shared symmetric key, Bob proposes the following protocol: Bob will generate a random key K that he will encrypt...

Q:

s1 educated (SSE) student for every three public school educated (PSE) students. Reasoning that students are not very dissimilar from threads, he suggests the following entry and exit routines be...

Q:

Managerial Decision Making Six Decision Stages in Chapter 5 I. Identify and Diagnose the Problem Consider the following questions when identifying and diagnosing the problem: Is there a difference...

Q:

Reference Textbook - Communicating at Work: Strategies for Success in Business and the Professions11th Edition In this two-part activity, you will demonstrate an understanding of cultural...

Q:

Traditional password entry schemes are susceptible to shoulder surfing in which an attacker watches an unsuspecting user enter their password or PIN number and uses it later to gain access to the...

Q:

Write a Java program, Authenticate, using the following guidelines: Traditional password entry schemes are susceptible to shoulder surfing in which an attacker watches an unsuspecting user enter...

Q:

Question 1 The progression of input, processing, output, and storage is known as the _____. a. output transmission cycle b. input transfer cycle c. secure storage cycle d. information processing...

Q:

Let A, B be sets. Define: (a) the Cartesian product (A B) (b) the set of relations R between A and B (c) the identity relation A on the set A [3 marks] Suppose S, T are relations between A and B, and...

Q:

3. Suppose the Jets raise ticket prices from $30 to $40 per seatand experience a 10 percent decline in tickets sold. What is theelasticity of demand for tickets? (2 points)

Q:

A ball with uniform mass density rolls without slipping on a turntable. Show that the ball moves in a circle (as viewed from the inertial lab frame), with a frequency equal to 2/7 times the frequency...

Q:

Annuities may be a new topic for you but you will more appreciate learning about them as you near retirement!You should particularly take time to learn the 2 - time - frame problems. Choose one of...

Q:

Explain Transportation Projects using a cost-benefit analysis approach in the case. (400-500 WORDS) case: TRUCK BYPASS Description of Project The California Department of Transportation (Caltrans)...

Q:

Be familiar with the five basic ways to manage demand.

Q:

Understand what is meant by productive capacity in a service context.

Q:

Understand how to use the marketing mix elements of price, product, place, and promotion to smooth out fluctuations in demand.