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Network
Security
Security Mechanisms
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Network Security Mechanisms: Comprehensive Overview - Prof. Khan, Lecture notes of Network security
A comprehensive overview of network security mechanisms, detailing various methods and technologies used to protect data and systems from unauthorized access and threats. It covers specific mechanisms such as encipherment, digital signatures, access control, data integrity, authentication exchange, traffic padding, routing control, notarization, trusted functionality, security labels, event detection, security audit trail, and security recovery. The document aims to educate students on the importance of data integrity, confidentiality, and availability in digital transactions, making it a valuable resource for understanding network security principles and practices. It is suitable for students and professionals seeking to enhance their knowledge of network security.
Typology: Lecture notes
2024/2025
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Network
Security
Objectives of
the Topic
- (^) After completing this topic, a student will be able to - (^) describe security mechanisms.
Encipherment
- (^) This security mechanism deals with hiding and covering of data which helps data to become confidential.
- (^) It is achieved by applying mathematical calculations or algorithms which reconstruct information into not readable form.
- (^) It is achieved by two famous techniques named Cryptography and Encipherment.
Digital Signature
- (^) This security mechanism is achieved by adding digital data that is not visible to eyes.
- (^) It is form of electronic signature which is added by sender which is checked by receiver electronically.
- (^) This mechanism is used to preserve data which is not more confidential but sender’s identity is to be notified..
Data Integrity
- A variety of mechanisms used to assure the integrity of a data unit or stream of data units.
- It is similar to sending packet of information known to both sending and receiving parties and checked before and after data is received.
- When this packet or data which is appended is checked and is the same while sending and receiving data integrity is maintained.
Authentication Exchange
- (^) A mechanism intended to ensure the identity of an entity by means of information exchange.
- (^) This security mechanism deals with identity to be known in communication.
Routing Control
- (^) Enables selection of particular physically secure routes for certain data and allows routing changes, especially when a breach of security is suspected.
Notarization
- (^) This is the usage of a trusted third party to assure specific properties of an information exchange.
Security Label
- (^) The marking bound to a resource (which may be a data unit) that names or designates the security attributes of that resource.
Event
Detection
- (^) Detection of security-relevant events.
Security
Recovery
- (^) Deals with requests from mechanisms, such as event handling and management functions, and takes recovery actions