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

Computer scienceunauthorized access to networks and the

Computer Science Unauthorized access to networks and the information they contain can present significant problems to an organization. Part of a good network improvement includes a review of system security and identific ...

Taskspecific issues that you need to address in the forum

Task Specific issues that you need to address in the forum discussions are provided within the first 3 topics. These questions are posed for you to reflect on in the form of written Discussion Board (forum) posts. As thi ...

Assignmentnetwork architecture paper using either the osi

Assignment Network Architecture Paper: Using either the OSI Reference Model or the TCP/IP Protocol Suite, describe how each layer of the Model/Suite represents the communication flow between organizational levels and acr ...

Dqfacebook email electronic commerce and collaborative

DQ Facebook, email, electronic commerce, and collaborative sites for both work and leisure are a normal part of our everyday computing activities. Personal information entered on these websites become partially owned by ...

Computer scienceprimary task response within the discussion

Computer Science Primary Task Response: Within the Discussion Board area, write 400-600 words that respond to the following questions with your thoughts, ideas, and comments. This will be the foundation for future discus ...

Threat management and disaster recovery final paper this is

Threat Management and Disaster Recovery Final Paper This is a two part assignment that will be submitted as one final paper Part 1 I would like you to complete a limited Risk Assessment for a fictional enterprise. This a ...

Firewall fundamentalsactions for firewall

Firewall Fundamentals Actions for 'Firewall Fundamentals Firewalls are considered the key element in securing networks. A firewall is usually a computer that sits on two different networks and passes allowed traffic betw ...

Short answer1 classify each of the following

Short Answer 1. Classify each of the following occurrences as an incident or disaster. If an occurrence is a disaster, determine whether business continuity plans would be called intoplay. a. A hacker breaks into the com ...

Network securitythe focus of the reseach paper is host

Network Security The focus of the reseach paper is Host Intrusion Detection Systems (HIDS) or AntiVirus Systems. Computer Virus creates major headaches for most organizations, as this list of 10 worst PC virus outbreaks ...

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 ...

  • 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

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

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