18 Questions
Which of the following best describes authentication?
Verifying the identity of a user
What is the main purpose of authorization?
Determining what actions an authenticated user is allowed to perform
Which access control mechanism uses an access control matrix?
Access Control Lists (ACLs)
What is the challenge of managing a large access control matrix?
Efficiently managing a matrix with a large number of entries
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
Which of the following is NOT an access control mechanism mentioned in the text?
Authentication
Which type of intrusion detection system (IDS) can have both host and network capabilities?
Anomaly Detection
What can failed login attempts indicate in the context of intrusion detection?
Password cracking attack
In signature detection, what is the purpose of setting values for N and M?
To slow down the attacker
What are the challenges in anomaly detection systems?
Identifying abnormal behavior
What statistical technique can be used to measure abnormal behavior in anomaly detection?
Bayesian statistics
What is the advantage of using anomaly detection in intrusion detection systems?
Detecting unknown attacks
Which of the following is a characteristic of covert channels?
They are virtually impossible to eliminate in any useful system
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
What is the purpose of a CAPTCHA?
To allow only humans to access certain resources
What is the meaning of the acronym OCR in the context of CAPTCHAs?
Optical Character Recognition
What is the role of a firewall in a network?
To provide secure access to the network
What type of firewall works at the application layer?
Application proxy
Test your knowledge on covert channels and communication in this quiz. Learn about the challenges of eliminating covert channels in systems and discover DoD guidelines for reducing covert channel capacity.
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