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Questions and Answers
What does availability ensure in the context of security objectives?
What does availability ensure in the context of security objectives?
- Access to information is not denied to authorized users. (correct)
- The system is protected from unauthorized manipulation.
- System users are verified and trusted.
- Data integrity is maintained and preserved.
Which concept goes beyond the traditional CIA triad in defining security objectives?
Which concept goes beyond the traditional CIA triad in defining security objectives?
- Traceability (correct)
- Authenticity
- Integrity
- Availability
What does authenticity ensure in a system?
What does authenticity ensure in a system?
- That information is always available to users.
- That users are who they claim to be. (correct)
- That actions can be traced to responsible parties.
- That systems can recover from faults.
Which of the following describes accountability in security objectives?
Which of the following describes accountability in security objectives?
What is a potential consequence of a loss of availability?
What is a potential consequence of a loss of availability?
Which security goal ensures actions can be uniquely identified with responsible parties?
Which security goal ensures actions can be uniquely identified with responsible parties?
Which term describes the confidence in the validity of a message's originator?
Which term describes the confidence in the validity of a message's originator?
What aspect does not fall under the CIA triad?
What aspect does not fall under the CIA triad?
What is the purpose of systems keeping records of their activities?
What is the purpose of systems keeping records of their activities?
What property does confidentiality address in information security?
What property does confidentiality address in information security?
Which of the following actions would typically constitute a security attack?
Which of the following actions would typically constitute a security attack?
What does data integrity ensure regarding information?
What does data integrity ensure regarding information?
Which of the following is a consequence of a loss of confidentiality?
Which of the following is a consequence of a loss of confidentiality?
What does the OSI Security Architecture primarily provide to managers?
What does the OSI Security Architecture primarily provide to managers?
Which of the following is NOT a component of data integrity?
Which of the following is NOT a component of data integrity?
What can be described as a security objective under the OSI Security Architecture?
What can be described as a security objective under the OSI Security Architecture?
What is the primary goal of a passive attack?
What is the primary goal of a passive attack?
What type of passive attack involves altering the contents of a message?
What type of passive attack involves altering the contents of a message?
Which of the following is an example of a denial-of-service attack?
Which of the following is an example of a denial-of-service attack?
Replay attacks are characterized by which of the following?
Replay attacks are characterized by which of the following?
Which of the following describes traffic analysis?
Which of the following describes traffic analysis?
What does access control allow in a networked environment?
What does access control allow in a networked environment?
What does the release of message contents entail?
What does the release of message contents entail?
Which statement accurately describes the role of an authentication service?
Which statement accurately describes the role of an authentication service?
What is the primary purpose of security services in communication?
What is the primary purpose of security services in communication?
Which of the following accurately describes an active attack?
Which of the following accurately describes an active attack?
In a masquerade attack, what does one entity do?
In a masquerade attack, what does one entity do?
What can a masquerade attack potentially allow an entity to do?
What can a masquerade attack potentially allow an entity to do?
Which type of attack involves replaying previously captured authentication sequences?
Which type of attack involves replaying previously captured authentication sequences?
What is NOT a characteristic of active attacks?
What is NOT a characteristic of active attacks?
Which of the following is considered a type of active attack?
Which of the following is considered a type of active attack?
How should the original message be handled to maintain security?
How should the original message be handled to maintain security?
What is the main goal of a denial-of-service attack?
What is the main goal of a denial-of-service attack?
What does data confidentiality primarily protect against?
What does data confidentiality primarily protect against?
Which of the following ensures that information is modified only by authorized individuals?
Which of the following ensures that information is modified only by authorized individuals?
How does nonrepudiation serve in communication?
How does nonrepudiation serve in communication?
Which protection layer covers all user data transmitted over a certain period?
Which protection layer covers all user data transmitted over a certain period?
What is implied by the term 'data integrity'?
What is implied by the term 'data integrity'?
What might happen during a network overload as part of a denial-of-service attack?
What might happen during a network overload as part of a denial-of-service attack?
Which condition does not pertain to the protection of data in transmission?
Which condition does not pertain to the protection of data in transmission?
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Study Notes
Security Objectives
- Confidentiality: Protecting information from unauthorized access.
- Integrity: Ensuring data changes only in authorized ways.
- Availability: Ensuring systems are functional and accessible to authorized users.
- Authenticity: Verifying the legitimacy of users and data sources.
- Accountability: Tracking actions to responsible entities for security breach analysis.
Security Attacks
- Active Attacks: Modify or create false data:
- Replay: Re-transmitting captured data units for unauthorized effects.
- Masquerade: One entity pretending to be another, often involving other active attacks.
- Data Modification: Altering, delaying, or reordering legitimate data for unauthorized effects.
- Denial of Service: Preventing normal system use or management, possibly targeting specific systems or entire networks.
- Passive Attacks: Eavesdropping or monitoring transmissions:
- Release of Message Contents: Monitoring unprotected communication channels.
- Traffic Analysis: Analyzing data transmission patterns.
Security Services
- Authentication: Confirms the identity of entities to enable tailored access rights.
- Access Control: Limits and manages access to systems and applications.
- Data Confidentiality: Protects transmitted data from passive attacks.
- Data Integrity: Ensures messages are received without alterations, duplications, or replays.
- Nonrepudiation: Prevents senders or receivers from denying transmitted messages.
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