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Henric Johnson1 Network Security /. 2 Outline Attacks, services and mechanisms Security attacks Security services Methods of Defense A model for Internetwork.

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Presentation on theme: "Henric Johnson1 Network Security /. 2 Outline Attacks, services and mechanisms Security attacks Security services Methods of Defense A model for Internetwork."— Presentation transcript:

1 Henric Johnson1 Network Security /

2 2 Outline Attacks, services and mechanisms Security attacks Security services Methods of Defense A model for Internetwork Security Internet standards and RFCs

3 Security requirements Information security: physical and administrative means, automated tools for protecting files or data stored on computers. The generic name for the collection of tools designed to protect data and to prevent hackers is computer security. Network security measures are needed to protect data during transmission. The term Internet security is used. There are no clear boundaries between these forms of security because a viruses may introduced in various ways. Internetwork security. 3

4 4 Attacks, Services and Mechanisms Security Attack: Any action that compromises the security of information. Security Mechanism: A mechanism that is designed to detect, prevent, or recover from a security attack. Security Service: A service that enhances the security of data processing systems and information transfers. A security service makes use of one or more security mechanisms.

5 5 Security Attacks

6 6 Interruption: This is an attack on availability Interception: This is an attack on confidentiality Modfication: This is an attack on integtrity Fabrication: This is an attack on authenticity

7 7 Security Goals Integrity Confidentiality Avaliability

8 8

9 9 Security Services Confidentiality (privacy) Authentication (who created or sent the data) Integrity (has not been altered) Non-repudiation (the order is final) Access control (prevent misuse of resources) Availability (permanence, non-erasure) – Denial of Service Attacks – Virus that deletes files

10 Henric Johnson10

11 11

12 12 Methods of Defence Encryption Software Controls (access limitations in a data base, in operating system protect each user from other users) Hardware Controls (smartcard) Policies (frequent changes of passwords) Physical Controls

13 13 Internet standards and RFCs The Internet society –Internet Architecture Board (IAB) –Internet Engineering Task Force (IETF) –Internet Engineering Steering Group (IESG)

14 14 Internet RFC Publication Process

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