Computer Science: An Overview (12th Edition)
12th Edition
ISBN: 9780133760064
Author: Glenn Brookshear, Dennis Brylow
Publisher: PEARSON
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Chapter 4, Problem 46CRP
Program Plan Intro
Firewall:
Firewall is used as a network security system which blocks all the incoming traffic addressed to applications. This means that a primary prevention technique is used to filter traffic passing through a point in the network called firewall program.
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Suppose an organization uses Kerberos for authentication.
In terms of security and service availability, what is the effect if either the AS (authentication server) or TGS (ticket granting server) goes down?
Explain what happens behind-the-scenes when a web client accesses a secure server resource, and how authentication and authorisation are handled by the web server itself. For this reason, you find the employment of layered protocols to be quite alluring. To back up your assertions, please provide examples.
Demonstrate how native authentication and authorization services are performed on the web server in response to a request from a web client for a secure server resource. Include the particulars of each step of the process. What are some of the reasons why, in your opinion, the implementation of layered protocols is such an appealing strategy? Are there any particular instances that you might use to back up the assertions you've made?
Chapter 4 Solutions
Computer Science: An Overview (12th Edition)
Ch. 4.1 - What is an open network?Ch. 4.1 - Prob. 2QECh. 4.1 - What is a router?Ch. 4.1 - Prob. 4QECh. 4.1 - Prob. 5QECh. 4.1 - Prob. 6QECh. 4.2 - Prob. 1QECh. 4.2 - Prob. 2QECh. 4.2 - Prob. 3QECh. 4.2 - Prob. 4QE
Ch. 4.2 - Prob. 5QECh. 4.2 - Prob. 6QECh. 4.2 - Prob. 7QECh. 4.2 - Prob. 8QECh. 4.3 - Prob. 1QECh. 4.3 - Prob. 2QECh. 4.3 - Prob. 3QECh. 4.3 - Prob. 4QECh. 4.3 - Prob. 5QECh. 4.4 - Prob. 1QECh. 4.4 - Prob. 2QECh. 4.4 - Prob. 3QECh. 4.4 - What keeps a computer on the Internet from...Ch. 4.5 - Prob. 1QECh. 4.5 - Prob. 2QECh. 4.5 - Prob. 3QECh. 4.5 - Prob. 4QECh. 4.5 - Prob. 5QECh. 4 - Prob. 1CRPCh. 4 - Prob. 2CRPCh. 4 - Prob. 3CRPCh. 4 - Prob. 4CRPCh. 4 - Prob. 5CRPCh. 4 - Prob. 6CRPCh. 4 - Prob. 7CRPCh. 4 - Prob. 8CRPCh. 4 - Prob. 9CRPCh. 4 - Prob. 10CRPCh. 4 - Prob. 11CRPCh. 4 - Prob. 12CRPCh. 4 - Prob. 13CRPCh. 4 - Prob. 14CRPCh. 4 - Prob. 15CRPCh. 4 - Prob. 16CRPCh. 4 - Prob. 17CRPCh. 4 - Prob. 18CRPCh. 4 - Prob. 19CRPCh. 4 - Prob. 20CRPCh. 4 - Prob. 21CRPCh. 4 - Prob. 22CRPCh. 4 - Prob. 23CRPCh. 4 - Prob. 24CRPCh. 4 - Prob. 25CRPCh. 4 - Prob. 26CRPCh. 4 - Prob. 27CRPCh. 4 - Prob. 28CRPCh. 4 - Prob. 29CRPCh. 4 - Prob. 30CRPCh. 4 - Prob. 31CRPCh. 4 - Prob. 32CRPCh. 4 - Prob. 33CRPCh. 4 - Prob. 34CRPCh. 4 - Prob. 35CRPCh. 4 - Prob. 36CRPCh. 4 - Prob. 37CRPCh. 4 - Prob. 38CRPCh. 4 - Prob. 39CRPCh. 4 - Prob. 40CRPCh. 4 - Prob. 41CRPCh. 4 - Prob. 42CRPCh. 4 - Prob. 43CRPCh. 4 - Prob. 44CRPCh. 4 - Prob. 45CRPCh. 4 - Prob. 46CRPCh. 4 - Prob. 47CRPCh. 4 - Prob. 48CRPCh. 4 - Prob. 49CRPCh. 4 - Prob. 50CRPCh. 4 - Prob. 1SICh. 4 - Prob. 2SICh. 4 - Prob. 3SICh. 4 - Prob. 4SICh. 4 - Prob. 5SICh. 4 - Prob. 6SICh. 4 - Prob. 7SICh. 4 - Prob. 8SICh. 4 - Prob. 9SICh. 4 - Prob. 10SICh. 4 - Prob. 11SICh. 4 - Prob. 12SI
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Similar questions
- When a web client requests access to protected resources on a web server, demonstrate the step-by-step implementation of native authentication and authorization services. What are the two most convincing reasons why layered protocols should be used? Give examples to back up your point.arrow_forwardScenario 2 An organization dedicated to reducing spam tries to get Internet service providers (ISPS) in an East Asian country to stop the spammers by protecting their mail servers. When this effort is unsuccessful, the anti-spam organization puts the addresses of these ISPS on its "black list." Many ISPS in the United States consult the black list and refuse to accept email from the blacklisted ISPS. This action has two results. First, the amount of spam received by the typical email user in the United States drops by 25 percent. Second, tens of thousands of innocent computer users in the East Asian country are unable to send email to friends and business associates in the United States. Questions 1. Did the anti-spam organization do anything wrong? 2. Did the ISPS that refused to accept email from the black listed ISPS do anything wrong? 3. Who benefited from the organization's action? 4. Who was hurt by the organization's action? 5. Could the organization have achieved its goals…arrow_forward113 Spoofing attack is a) an application that captures TCP/IP data packets, which can maliciously be used to capture passwords and other data while it is in transit either within the computer or over the network. b) a situation in which one person or program successfully masquerades as another by falsifying data and thereby gaining illegitimate access. c) a toolkit for hiding the fact that a computer’s security has been compromised, is a general description of a set of programs which work to subvert control of an operating system from its legitimate (in accordance with established rules) operators. d) None of thesearrow_forward
- What is the difference between Non-Repudiation and Anonymity Protocols? Explain the Non-Repudiation Protocol's Goals and the Zhou-Gollman Non-Repudiation Protocol.arrow_forwardIs encryption of the connection and data from end to end possible? What is the advantage? Describe a scenario in which all encryption methods would be beneficial.arrow_forwardAuthentication serves which purposes? Which authentication methods are best and worst?arrow_forward
- When a web client attempts to get access to protected resources hosted by a web server, it is important to demonstrate the step-by-step implementation of native authentication and authorization services. What are the two most persuasive arguments in favor of layered protocols and why should they be used? You need to provide specific examples to back up your point.arrow_forwardDoes desktop computer software exist that can reliably create secret keys for use in cryptography protocols?arrow_forwardComputer science Make a list of the different sorts of threats that message authentication prevents.arrow_forward
- Make a distinction between spoofing and session hijacking. In the case that you're a web user, what are some of the countermeasures you use to protect yourself against session hijacking?arrow_forwardRegarding a peer-to-peer file-sharing program, do you agree that "there is no feeling of client and server sides of a communication session"? Why is this happening, or why is it not happening?arrow_forwardThe security scheme for IEEE 802.11, prior to 11i, was Wired Equivalent Privacy (WEP). WEP assumed all devices on the network share a security key. The purpose of the authentication scenario is for the STA to prove that it possesses the security key. Authentication proceeds as shown in Figure 24.13 What are the benefits of the authentication scheme? The authentication scheme is incomplete. What is missing and why is it important? What is a cryptographic weakness of this scheme?arrow_forward
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