Question: Authentication/Key Distribution(2+4+2+2) Consider the following protocol for Authentication/Key Distribution: (X and Y are two nodes, A is a CA/KDC, N and N2 are random numbers,

Authentication/Key Distribution(2+4+2+2) Consider the following protocol for Authentication/Key Distribution: (X and

Authentication/Key Distribution(2+4+2+2) Consider the following protocol for Authentication/Key Distribution: (X and Y are two nodes, A is a CA/KDC, N and N2 are random numbers, and Ex means encrypted with the secret key of X.) 2. A-X: Ex(Ni, X,Y, K, Ey (K, X)) 4, YX: Ex(Na) 1. What is purpose of Ni in message 2? 2. Show that if an attacker were to break an old K, he/she can impersonate user X to user Y 3. How to solve this problem? 4. What is the purpose of Steps 4 and 5

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!

Authentication/Key Distribution(2+4+2+2) Consider the following protocol for Authentication/Key Distribution: (X and Y are two nodes, A is a CA/KDC, N_1 and N_2 are random numbers, and E_x means...

computer network security questions Help please!!! thanks Authentication/Key Distribution(2+4+2+2) Consider the following protocol for Authentication/Key Distribution: (X and Y are two nodes, A is a...

Network security problems help! very greatful!! Authentication/Key Distribution(2+4+2+2) Consider the following protocol for Authentication/Key Distribution: (X and Y are two nodes, A is a CA/KDC, Ni...

5. Consider the following protocol for Authentication/Key Distribution: (X and Y are two principals, A is a Certificate Authority or a Key Distribution Center, RX is a randon number, and EX means...

Developments in Technology Light is incident from air on the end face of a multimode optical fibre at angle of incidence as shown below. n n 1 2 The refractive indices of the core and cladding are...

1 2.3 Definition of a Discrete Probability Function Definition: Let S be a discrete sample space from some experiment. A function P, defined on all events in S, is said to be a probability function...

re Regular Languages and Finite Automata (a) Let L be the set of all strings over the alphabet {a, b} that end in a and do not contain the substring bb. Describe a deterministic finite automaton...

1. A player throws a fair die and simultaneously flips a fair coin. If the coin lands heads, then she wins twice, and if tails, then one-half of the value that appears on the die. Determine her...

"Fortran, Algol and Lisp invented most programming language concepts 50 years ago; adding the concept of object-orientation suffices to explain all programming languages to date". To what extent is...

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...

Write an equation in standard form for each graph. a. b. c. d. 2.3.0.75 33.25

Which of the following are included in the calculation of this years GDP? a. Twelve-year-old Johnny mows his familys lawn. b. Dave Malone buys a used car. c. Barbara Wilson buys a bond issued by...

Suppose Trudy is on an airplane that offers paid Wi - Fi access. She is determined to access the Wi - Fi / Internet without paying for it . On the plane: The Wi - Fi network is encrypted, so Trudy...

Compared with half a century ago, adoption has become _ _ _ _ _ _ _ _ _ common, but it is more open and acceptabl e , so we probably discuss it _ _ _ _ _ _ _ . fill in the blanks more or much less or...

1. Diagnose and solve a transfer of training problem.

6. Go to http://agelesslearner.com/intros/adultlearning.html, a site authored by Marcia L. Conner about how adults learn. Scroll down to the bottom of the page and click on Learning Styles...

7. Go to www.schneider.com, the Web site for Schneider National, a transportation management company that provides logistics and trucking services. Click on Drivers. Scroll down the page and click on...