Questions

The biggest script security threat has always been the acceptance of untrusted data. What is the best way for scripts to accept data and preserve the trust?

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Outline and discuss the factors that influence threat information quality

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Discuss any security surveillance system.

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Ethernet Technology Appeal

Why is Ethernet technology more appealing to users than the rest of the LAN technologies?

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Discuss the much talked about role of public key authentication in the future of e-commerce. Is the role of PKI in authentication exaggerated

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Physical Access Restrictions

Physical access to resources is essential and must be the most restricted. Why?

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Discuss the weaknesses of symmetric encryption

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In your opinion, is computer forensics a viable tool in the fight against the cybercrime epidemic?

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Discuss ways a system administrator can reduce system scanning by hackers.

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Describe the sequence of steps a sender of a message takes when sending the message with a digital signature. What steps does the receiver of such a message take to recover the message?

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Describe the message authentication process using:

Describe the message authentication process using: (a) Symmetric encryption (b) Public key encryption (c) Hash function

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Discuss the best ways of protecting an internal network using firewalls from the following attacks: * SMTP server hijacking * Bugs in operating systems * ICMP redirect bombs * Denial of service * Exploiting bugs in applications

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Compare and contrast the problems and benefits of KDC and PKI

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Comment on the statement regarding CAs and IPsec.

Some say that with the development of systems such as IPsec, the role the CAs play in modern communication will diminish and eventually cease. Comment on this statement.

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Why are system intrusions dangerous?

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Discuss the advantages of using an application-level firewall over a network-level firewall.

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Circuit-Level vs. Network-Level Firewalls

What are circuit-level firewalls? How are they different from network-level firewalls?

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Are IDSs similar to firewalls?

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Discuss the best approaches to implementing an effective IDS.

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What is a bastion router? How different is it from a firewall?

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Discuss the benefits of system scanning.

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Firewall Design for File Uploads to Internal Network

How would you design a firewall that would let Internet-based users upload files to a protected internal network server?

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Firewall Services and Protocols

Search and discuss as many services and protocols as possible offered by a modern firewall.

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Discuss the difficulties faced by cybercrime investigators.

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What is a communication protocol?

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Discuss the differences between a firewall and a packet filter

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Why is hacking a big threat to system security?

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Scripting and Security in Computer Networks and Web Browsers

The most common CGI function is to fill in forms; the processing script actually takes the data input by the Web surfer and sends it as e-mail to the form administrator. Discuss the different ways such a process can fall victim to an attacker.

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Why is it difficult to implement distributed authorization?

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Why is crime reporting so low in major industries?

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Why are vulnerabilities difficult to predict?

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Why are design flaws such a big issue in the study of vulnerability?

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What is security and information security? What is the difference?

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What is PKI? Why is it so important in information security?

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What are the differences between symmetric and asymmetric key systems?

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Web authorization and performance

Web authorization is central to the security of all Web applications. What is the best way to safeguard all Web applications and at the same time make Web access reliable and fast?

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Virtual Security

Virtual security seems to work in some systems. Why is this so? Can you apply it in a network environment?

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Transport Layer Security Mechanisms

Are there security mechanisms applicable at transport layer? Is it safer?

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Too Much Authorization and Least Privilege

With the principle of “least privilege,” is it possible to have too much authorization? What happens when there is too much authorization?

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Three-way Handshake as a Security Threat

Give a detailed account of why the three-way handshake is a security threat.

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States in Security Process

It has been stated that security is a continuous process; what are the states in this process?

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Social engineering has been frequently cited as a source of network security threat. Discuss the different elements within social engineering that contribute to this assertion.

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Security Policies

Some security experts do not believe in security policies. Do you? Why or why not?

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Security Mechanisms for Confidentiality

What are the best security mechanisms to ensure information confidentiality?

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Security Best Practices and Mechanisms

Security best practices are security guidelines and policies aimed at enhancing system security. Can they work without known and proven security mechanisms?

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RPC Authentication: Per-Request Authentication

In RPC authentication, why it is necessary that each client request that server services be authenticated by the authentication server?

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Reasons for Anonymous Authentication in High-Security Systems

There are many compelling reasons why a system that must implement security to the maximum must give anonymous authentication to a class of users. Detail five of these reasons.

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Network Vulnerability Identification

Is it possible to locate all vulnerabilities in a network? In other words, can one make an authoritative list of those vulnerabilities? Defend your response.

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Network Layer Security Mechanisms and Efficacy

IPsec provides security at the network layer. What other security mechanism is applicable at the network layer? Do network layer security solutions offer better security?

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Need for Communication Protocols

Why do we need communication protocols?

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Merits and Demerits of Centralized and Decentralized Authorization

Discuss the merits and demerits of centralized and decentralized authorization.

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Kerberos Tickets

The Kerberos authentication process actually involves two tickets. Explain the need for each ticket and why only one ticket cannot be used.

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Kerberos Authentication Process Players

Discuss in detail the role played by each one of the five players in a Kerberos authentication process.

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Is it possible to implement full distributed authorization? What will be involved?

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Is hacking getting under control?

Following the history of hacking, can you say that hacking is getting under control? Why or why not?

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Insider Abuse Solutions

Insider abuse is a major crime category. Discuss ways to solve it.

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Increase in Virus and Worm Attacks

There seems to have been an increase in the number of reported virus and worm attacks on computer networks. Is this really a sign of an increase, more reporting, or more security awareness on the part of the individual? Comment on each of these factors.

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Importance of Security Plans

Why it is important to have a security plan despite the various views of security experts concerning its importance?

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Global Privilege in Authorization Systems

Discuss the concept of global privilege. Does it work well in a distributed authorization or centralized authorization?

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Fusion of Network Technologies

Do you foresee a fusion between LAN, MAN, and WAN technologies in the future? Support your response.

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Four WAN Technologies

List four WAN technologies

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Four Access Methods and Their Weaknesses

Discuss four access methods, giving the weaknesses of each

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Firewall Protocol Implementation

Show how data protocols such as TCP, UDP, and ICMP can be implemented in a firewall and give the type of firewall best suited for each of these protocols.

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Effective Legislation Against Hacking

What kind of legislation can be effective to prevent hacking?

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Dispute between Digital and Legal Non-repudiation

Why is there a dispute between digital nonrepudiation and legal nonrepudiation?

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Discuss the politics of dealing with hacktivism.

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Discuss the many ways in which access can be abused.

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Discuss the future of wireless LANs.

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Direction of Network Technology

Network technology is in transition. Discuss the direction of network technology.

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Difficulties in Enforcing Security Best Practices

Discuss the difficulties encountered in enforcing security best practices.

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Devise a plan to compute the cost of computer crime.

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Comparison of Authorization Models: NOS vs. Stand-alone OS

Compare the authorization model used by the network operating systems (NOSs) to that used by the old stand-alone operating systems

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Comparison of ATM and ISDN Technologies

With the future in mind, compare and contrast ATMs and ISDN technologies.

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Client-side vs. Server-side Scripting Security

In terms of security, is client-side scripting better than server-side scripting? Why or why not?

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Client-side vs. Server-side Scripting

What are the differences between client-side and server-side scripting? Is one better than the other?

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CGI and Web Programming Revolution

How did CGI revolutionize Web programming?

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Bluetooth as a "magic technology"

Some people think that Bluetooth is a magic technology that is going to change the world. Is this assertion true?

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Benefits of Authorization

What are the benefits of authorization?

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Authentication Policy Involvement

Making an authentication policy must be a well-kept secret to ensure the security of the intended system. Why then is it so important that a security policy include an authentication policy that involves as many as possible? What kind of people must be left out?

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Application Layer Security Mechanisms

Discuss two security mechanisms applied at the application layer. Are they safer than those applied at the lower network layer?

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Anonymous Authentication and System Security

Does anonymous authentication compromise the security of systems for the advantages of a few services?

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Access Privileges in Computing Systems

List and discuss the most common access privileges in a computing system.

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Differentiate between computer and network forensics.

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Can system intrusions be stopped? Support your response.

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Discuss the weaknesses of public key encryption

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Why is it difficult to establish permanent standards for a technology like WAN or LAN?

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Software Verification and Validation (V&V) in System Vulnerability

Part of the problem in design flaws involves issues associated with software verification and validation (V&V). What is the role of V&V in system vulnerability?

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Discuss the role of digital signatures in modern communication

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CGI Scripting and Security

CGI is also used in discussions allowing users to talk to the customer and back. CGI helps in creating an ongoing dialog between multiple clients. Discuss the security implications of dialogs like this.

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List the major protocols discussed in this chapter.

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Wireless WAN Fundamentals

What is a wireless WAN? What kind of technology can be used in it? Is this the wave of the future?

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What do you think are the weak points of TCP/IP?

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Discuss the reasons why ISDN failed to catch on as WAN technology.

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Discuss the benefits of enhancement of basic authentication with a cryptographic scheme such as Kerberos, SSL, and others. Give specific examples.

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Discuss the pros and cons of four LAN technologies.

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Bluetooth and Personal Wireless Networks

Many people see Bluetooth as a personal wireless network (PAN). Why is this so? What standard does Bluetooth use?

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Discuss the risks to the protected internal network as a result of a DMZ

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Why is PKI so vital in modern communications?

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What is the best way to deal with hacking?

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Discuss the limitations of a KDC system in modern communication

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Discuss the role of certificate authentication in e-commerce

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Access Control and Authorization: Denying Document with Extended Links

Consider an environment where each server does its own authorization. If an access request is made to a document that has extended links and one of the link requests is denied, should the whole document request be denied? Why or why not?

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Access Control: Least Privilege Principle

Discuss the benefits and problems resulting from the “least privilege” principle often used in access control.

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Authentication using certificates, although considered safe, suffers from weaknesses. Discuss these weaknesses using specific examples.

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Choosing and Using Security Best Practices

If you are an enterprise security chief, how would you go about choosing a security best practice? Is it good security policy to always use a best security practice? What are the benefits of using a best practice?

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Compare or discuss the differences between any two security systems.

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Computer Network Fundamentals: Encryption Standards Security

Most of the encryption standards that are being used such as RSA and DES have not been formally proven to be safe. Why then do we take them to be secure—what evidence do we have?

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List and discuss the types of hacker crimes.

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Discuss two LAN technologies that are NOT Ethernet or token ring.

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Discuss a good security auditing system.

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Why was VBScript not very popular?

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CGI and Database Security

CGI is often used to manage extensive databases. Databases store sensitive information. Discuss security measures you can use to safeguard the databases.

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Security Standards Adaptation

Security standards are changing daily. Is it wise to pick a security standard then? Why or why not?

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Kerberos and SSL are additional layers to enhance authentication. Detail how these enhancements are achieved in both cases.

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Many predict that the future of e-commerce is pegged on the successful implementation of authentication. Discuss.

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