Covert Channels and Communication Quiz

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Which of the following best describes authentication?

Determining what actions an authenticated user is allowed to perform

Restricting access to the system based on user identity

Verifying the identity of a user (correct)

Managing access control lists

What is the main purpose of authorization?

Determining what actions an authenticated user is allowed to perform (correct)

Managing access control lists

Verifying the identity of a user

Restricting access to the system based on user identity

Which access control mechanism uses an access control matrix?

Access Control Lists (ACLs) (correct)

Capabilities (C-lists)

Authentication

OS Accounting

What is the challenge of managing a large access control matrix?

Efficiently managing a matrix with a large number of entries Signup and view all the answers

What is the purpose of checking the access control matrix before allowing access to a resource?

Determining what actions an authenticated user is allowed to perform Signup and view all the answers

Which of the following is NOT an access control mechanism mentioned in the text?

Authentication Signup and view all the answers

Which type of intrusion detection system (IDS) can have both host and network capabilities?

Anomaly Detection Signup and view all the answers

What can failed login attempts indicate in the context of intrusion detection?

Password cracking attack Signup and view all the answers

In signature detection, what is the purpose of setting values for N and M?

To slow down the attacker Signup and view all the answers

What are the challenges in anomaly detection systems?

Identifying abnormal behavior Signup and view all the answers

What statistical technique can be used to measure abnormal behavior in anomaly detection?

Bayesian statistics Signup and view all the answers

What is the advantage of using anomaly detection in intrusion detection systems?

Detecting unknown attacks Signup and view all the answers

Which of the following is a characteristic of covert channels?

They are virtually impossible to eliminate in any useful system Signup and view all the answers

How long would it take to leak a 256-bit AES key through a covert channel with a capacity of 1 bit per second?

Less than 5 minutes Signup and view all the answers

What is the purpose of a CAPTCHA?

To allow only humans to access certain resources Signup and view all the answers

Covert Channels and Communication Quiz

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Questions and Answers

Which of the following best describes authentication?

What is the main purpose of authorization?

Which access control mechanism uses an access control matrix?

What is the challenge of managing a large access control matrix?

What is the purpose of checking the access control matrix before allowing access to a resource?

Which of the following is NOT an access control mechanism mentioned in the text?

Which type of intrusion detection system (IDS) can have both host and network capabilities?

What can failed login attempts indicate in the context of intrusion detection?

In signature detection, what is the purpose of setting values for N and M?

What are the challenges in anomaly detection systems?

What statistical technique can be used to measure abnormal behavior in anomaly detection?

What is the advantage of using anomaly detection in intrusion detection systems?

Which of the following is a characteristic of covert channels?

How long would it take to leak a 256-bit AES key through a covert channel with a capacity of 1 bit per second?

What is the purpose of a CAPTCHA?

What is the meaning of the acronym OCR in the context of CAPTCHAs?

What is the role of a firewall in a network?

What type of firewall works at the application layer?

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