Chapter 5 Security Principles in Information Technology

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Questions and Answers

What does the principle of 'Confidentiality' aim to prevent?

Unauthorized modification of files

Unauthorized physical damage to property

Unauthorized access of information to third parties (correct)

Unauthorized withholding of information from those who need it

Which principle aims to prevent unauthorized modification of files?

Confidentiality

Deterrence

Integrity (correct)

Availability

What is the main goal of 'Physical Security'?

Prevention of unauthorized withholding of information

Prevention of unauthorized access of information

Prevention of access to physical facilitates like computer systems (correct)

Prevention of unauthorized modification of files

Which mechanism assumes the intruder has succeeded or is in the process of gaining access to the system?

Detection Signup and view all the answers

What is the role of 'Response' mechanism in security?

To respond to the failure of first three mechanisms Signup and view all the answers

What is the primary function of a firewall in an information system facility?

Isolating the sensitive portions of the facility from the outside world Signup and view all the answers

What does 'Information System Security' involve?

Prevention of access to information by encryption and authentication Signup and view all the answers

What is the purpose of using symmetric encryption in information security?

To encrypt and decrypt messages using a single shared key Signup and view all the answers

What is the main goal of physical security barriers around a protected resource?

Preventing unauthorized access to the facility Signup and view all the answers

In the context of electronic access controls, what is the role of stateful inspection firewalls?

Filtering packets based on preset conditions Signup and view all the answers

What is the primary purpose of using authentication and audit trails in information security controls?

To verify the identity of users accessing the information source Signup and view all the answers

What is the function of buried seismic sensors as part of physical security barriers?

Detecting motion and intrusion attempts Signup and view all the answers

Which mechanism aims to protect communications channels from eavesdropping by sniffers?

Symmetric encryption Signup and view all the answers

What is a common feature of proxy servers in electronic access controls?

Acting as a gateway between users and the internet Signup and view all the answers

How does asymmetric encryption differ from symmetric encryption in information security?

Asymmetric encryption requires both sender and receiver to possess the same key, while symmetric encryption uses different keys for encryption and decryption Signup and view all the answers

What is the purpose of using locks and keys in physical security barriers?

Securing the area surrounding the facility Signup and view all the answers

Study Notes

Confidentiality and Data Protection

The principle of 'Confidentiality' aims to prevent unauthorized access, use, disclosure, or disruption of data.

Data Integrity

The principle that aims to prevent unauthorized modification of files is Data Integrity.

Physical Security

The main goal of 'Physical Security' is to prevent unauthorized physical access, damage, or interference with sensitive information, equipment, or facilities.
The primary function of physical security barriers around a protected resource is to prevent or delay unauthorized physical access.

Intrusion Detection and Response

The mechanism that assumes the intruder has succeeded or is in the process of gaining access to the system is called Intrusion Detection.
The role of the 'Response' mechanism in security is to take action to stop or limit the damage when an intrusion is detected.

Firewalls and Network Security

The primary function of a firewall in an information system facility is to control incoming and outgoing network traffic based on predetermined security rules.
In the context of electronic access controls, the role of stateful inspection firewalls is to inspect the contents of packets and deny or allow them based on the rules defined.

Information System Security

'Information System Security' involves protecting information and information systems from unauthorized access, use, disclosure, disruption, modification, or destruction.

Encryption

The primary function of symmetric encryption in information security is to provide confidentiality and integrity by encrypting data with a single secret key.
Asymmetric encryption differs from symmetric encryption in that it uses a pair of keys: a public key for encryption and a private key for decryption.

Physical Security Barriers

The function of buried seismic sensors as part of physical security barriers is to detect and prevent unauthorized physical access.
The purpose of using locks and keys in physical security barriers is to control access to sensitive areas or equipment.

Network Security Mechanisms

The mechanism that aims to protect communications channels from eavesdropping by sniffers is encryption.
A common feature of proxy servers in electronic access controls is that they act as an intermediary between clients and servers, filtering and controlling traffic.

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Description

Test your understanding of the principles of security in information technology, including confidentiality, integrity, and availability. Explore how security helps prevent unauthorized access, use, alteration, and theft of information and property.