One mechanism for resisting replay attacks in password, Ask an Expert

Engineering

One mechanism for resisting "replay" attacks in password authentication is to use one-time passwords: A list of passwords is prepared, and once password [N] has been accepted, the server decrements N and prompts for password[N - 1] next time. At N = 0 a new list is needed. Outline a mechanism by which the user and server need only remember one master password mp and have available locally a way to compute password[N] = f(mp, N). Hint: Let g be an appropriate one-way function (e.g., MD5) and let password[N] = g N(mp) = g, applied N times to mp. Explain why knowing password[N] doesn't help reveal password[N - 1].

View complete question

Computer Engineering, Engineering

Category:- Computer Engineering
Reference No.:- M91769957

Have any Question?Write your Review or question?

Related Questions in Computer Engineering

Question suppose you want to store the following

Question : Suppose you want to store the following information: Student_id Course Mark 111 Maths 78 111 Physics 90 222 Biology 89 333 Physics 60 333 Chemistry 75 1.a Is this table in first normal form? Why or Why Not? 1. ...

Consider the market for small business loans in the context

Consider the market for small business loans. In the context of this market. How adverse selection impact lenders. How does adverse selection impact borrowers? In the context of this market provide 2 things that a lender ...

Question please review the description of the organization

Question: Please review the description of the organization that is the subject of your semester project. The description of that organization, CITY GENERAL HOSPITAL, is described in the instructions for Phase I that you ...

Describe the types of network attacks and identify physical

Describe the types of network attacks and identify physical security attacks and vulnerabilities.

A real estate office manages 50 apartment units when the

A real estate office manages 50 apartment units. When the rent is $550 per month, all units are occupied. However, for each $55 increase in rent per month, one unit becomes vacant. How many units should be rented to maxi ...

In my sample database i need to use select statements to

In my sample database I need to use SELECT statements to find the following: 1) Find the full names of supervisors together with the total number of employees directly supervised by each one of them. 2) Find the full nam ...

Question summary using an organization of your

Question: Summary: Using an organization of your choice: Develop a Complete Disaster Recovery Plan to be submitted to the executive board of your company. Please note that this is a formal writing, all references (peer-r ...

Solutions may require mathematical proofs tracing of

Solutions may require mathematical proofs, tracing of algorithms (displaying the calculations and values of variables for each iteration of the algorithm), algorithm design, and writing programs. The following submission ...

Question suppose a node is on the same lan as 973939166

Question : Suppose a node is on the same LAN as 97.39.39.166 needs 97.39.39.166's MAC address. What would the destination address of the ARP query be (link layer)? The response must be typed, single spaced, must be in ti ...

Uranium vi fluoride is crucial for the enrichment of

Uranium (VI) fluoride is crucial for the enrichment of weapons-grade uranium. If a 1.0 mol sample of helium effuses in 255 s, how many seconds will it take for the same amount of uranium (VI) fluoride to effuse under the ...

4,153,160 Questions Asked
13,132 Experts
2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Recent Questions

Ask Computer Engineering Expert