Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Computer Network & Security Expert

1) In real world, driver licenses are used to do authentication. Describe why a scanned-in digital copy of the driver license can’t be used by the server to authenticate owner (of the driver license) and let him login into the server?

2) Both encryption algorithms and hash algorithms transform messages, but why do encryption algorithms always need a key while hash algorithms do not?

3) Propose one method which uses a clock to generate one-time passwords. Describe your method with sufficient details.

4) Time-synchronized authentication could handle which of the following threats. Select all the threats that time-synchronized authentication could handle: __________

A) The long-term password is stolen by the hacker
B) Some used one-time passwords are stolen by the hacker
C) Replay attack
D) The clock is stolen
E) The hand-held authenticator is stolen

5) In challenge-response authentication, both the User ID (i.e., message 1) and the Challenge (i.e., message 2) are in cleartext, but why is challenge-response authentication still a secure authentication method that can defeat replay attacks? Please describe your reason with sufficient details.

6) Suppose Alice uses S/Key and a seed x to generate 200 one-time passwords for her to login into the EBay server. Please answer the following problems:

6.1) What is the 106th password that will be used for Alice to login into the EBay server? Please justify your answer with sufficient details.

6.2) When Alice logins into the server the 6th time (i.e., when the 6th password used to login is used by Alice), what is stored in the EBay server’s password file? Please justify your answer with sufficient details.

6.3) After the 22nd password used to login into the server is used by Alice, Mallory, the bad guy, steals her 87th password. Among the 200-22=178 passwords left for Alice to use, how many can still be used by Alice without worrying about attacks? Please justify your answer with sufficient details.

Computer Network & Security, Computer Science

  • Category:- Computer Network & Security
  • Reference No.:- M94620
  • Price:- $80

Guranteed 48 Hours Delivery, In Price:- $80

Have any Question? 


Related Questions in Computer Network & Security

Question 1which of the following must you do before ip

Question 1 Which of the following must you do before IP source guard can be used on a switch port? (Select 2 choices.) A) Enable IP routing on the switch port. B) Enable DHCP snooping on the switch. C) Configure static I ...

Assignment give an answer to the following topicswhat are

Assignment: Give an answer to the following topics: What are the security issues with wireless LANs and WANs in a data processing environment? What are the recommended solutions to the issues identified? What are the sec ...

Assignmentyou are hired as a chief technology officer cto

Assignment You are hired as a Chief Technology Officer (CTO) of a startup company, which has two branches; one Los Angeles and one in San Francisco. The company hired employees to begin working on the design of the produ ...

Presentation - tool comparisonat this point you have been

Presentation - Tool Comparison At this point, you have been introduced to various security tools (Network Discovery, Network Scanning, DLP, Firewalls, and HIDS). You are to take one of the five identified categories of t ...

Computer securitycryptography is the practice and study of

Computer Security Cryptography is the practice and study of techniques for secure communication in the presence of third parties called adversaries, and it is about constructing and analyzing protocols that prevent third ...

Assignmentyou have been tasked with reconfiguring the

Assignment You have been tasked with reconfiguring the network for your company, which has grown considerably over the past year. You have used only static routing in the past, but you do not wish to spend the administra ...

1 when an organization undertakes an infosec-driven review

1. When an organization undertakes an InfoSec-driven review of job descriptions, which job descriptions must be reviewed? Which IT jobs not directly associated with information security should be reviewed? 2. List and de ...

Computer sciencenetworks are not perfect and errors will

Computer Science Networks are not perfect, and errors will occur because of software and hardware problems. Network downtime is costly to business operations and should be minimized where economically possible. Part of t ...

Assignment1 as a new security manager for a retail

Assignment 1. As a new security manager for a retail operation, you have been asked to create a new loss prevention and risk management program that will be presented to upper management. Create a 10- to 12-slide Microso ...

1a briefly explain how an integrity check value icv may be

1. (a) Briefly explain how an integrity check value (ICV) may be used in network communication to detect errors. (b) When using an ICV, explain why (i) a message might be transmitted correctly but the receiver believes t ...

  • 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

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen