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Questions and Answers
Security services are intended to enhance the speed of data processing systems.
False
Security mechanisms are used to provide a security service.
True
Authentication is a security service that prevents unauthorized use of a resource.
False
Confidentiality is a security service that protects data from unauthorized modification.
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Security services are implemented by security mechanisms.
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X.800 defines a security service as a service that provides a specific kind of speed to a system.
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Access control is a security service that ensures the integrity of data.
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Security services are closely related to security mechanisms.
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Traffic analysis is a type of active attack.
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Masquerade is a type of passive attack.
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Security implementation involves four complementary courses of action.
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Modification of messages is a type of passive attack.
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Encryption is used for prevention and detection of security threats.
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Denial of Service is an attack on confidentiality.
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The use of backup systems is a part of security response.
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Interception is an attack on integrity.
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Intrusion detection systems are used to prevent unauthorized access.
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Fabrication is an attack on integrity.
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Security implementation involves only three courses of action.
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Denial of service attacks can be prevented using encryption algorithms.
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Passive attacks involve modification of the data stream.
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Security response involves halting an attack and preventing further damage.
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Replay Attack is a type of passive attack.
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Encryption is used to respond to security threats.
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Security recovery involves restoring systems and data after an attack.
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Prevention is the only course of action in security implementation.
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The ITU-T standards are referred to as FIPS xxx.
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The CIA Triad consists of Confidentiality, Integrity, and Availability.
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Authenticity is a part of the CIA Triad.
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The main goal of Accountability is to generate the requirement for actions of an entity to be traced uniquely to that entity.
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NIST is responsible for producing RFCs xxx.
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The Internet Society (ISOC) produces X 123… Recommendations.
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Revealing the data only to authorized users is a part of the Integrity requirement.
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The CIA Triad consists of only three pillars of information security.
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Countermeasures are used to introduce new vulnerabilities to a system.
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Corrupted assets are an example of loss of confidentiality.
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Threats are capable of exploiting vulnerabilities to an asset.
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Active attacks attempt to learn or make use of information from the system.
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Passive attacks are easy to detect and prevent.
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Release of message contents is a type of traffic analysis.
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Snooping refers to unauthorized access to or modification of data.
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The goal of countermeasures is to eliminate residual risks to the assets.
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Study Notes
Security Services
- Security services are intended to counter security attacks and make use of one or more security mechanisms to provide the service.
- ITU-T (X.800) provides security services and mechanisms to implement those services.
Security Mechanisms
- Security mechanisms are used to provide security services.
- Security services and mechanisms are closely related.
Types of Security Services
- Authentication: assurance that a communicating entity is the one it claims to be.
- Access Control: prevention of unauthorized use of a resource.
- Confidentiality: protection of data from unauthorized disclosure.
Security Implementation
- Prevention: detection and response to security incidents.
- Detection: identifying security incidents.
- Encryption: protection of data in transit and at rest.
- Access Control: prevention of unauthorized access to resources.
Security Threats
- Interruption: an asset of the system is destroyed or becomes unavailable.
- Interception: an unauthorized party gains access to an asset.
- Modification: an unauthorized party tampers with an asset.
- Fabrication: an unauthorized party inserts counterfeit objects into the system.
CIA Triad
- Confidentiality: ensuring that only authorized access to sensitive information.
- Integrity: ensuring that data and systems are protected from unauthorized modification.
- Availability: ensuring that systems and data are accessible and usable when needed.
Additional Concepts
- Authenticity: verifying the identity of users and ensuring the authenticity of data.
- Accountability: tracing actions to specific entities to ensure accountability.
Security Standardization Organizations
- International Telecommunication Union - Telecommunication Standardization Sector (ITU-T)
- National Institute of Standards & Technology (NIST)
- Internet Society (ISOC)
Security Attacks
- Passive Attacks: attempts to learn or make use of information from the system but does not affect system resources.
- Active Attacks: attempts to alter system resources or affect their operation.
Types of Passive Attacks
- Traffic Analysis: obtaining information by monitoring online traffic.
- Release of Message Contents (Snooping): unauthorized access to or interception of data.
Active Attacks
- Masquerade: one entity pretends to be a different entity.
- Replay Attack: passive capture of a data unit and its subsequent retransmission to produce an unauthorized effect.
- Modification Attack: alteration of a legitimate message to produce an unauthorized effect.
- Denial of Service: preventing or inhibiting the normal use or management of communications facilities.
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Description
This quiz covers security services and mechanisms in computer networks, including their relationship and implementation according to ITU-T(X.800) standards.
