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Comprehensive Overview of Network Security Mechanisms and Attacks

Explore security attacks, services, defense methods, and internet standards for internetwork security. Learn about security goals, services, and defense mechanisms in the digital realm. Dive into the roles of security mechanisms and mechanisms in safeguarding data systems.

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Comprehensive Overview of Network Security Mechanisms and Attacks

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  1. Network Security Henric Johnson Blekinge Institute of Technology, Sweden www.its.bth.se/staff/hjo/ henric.johnson@bth.se +46 708 250375 Henric Johnson

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

  3. 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. Henric Johnson

  4. Security Attacks Henric Johnson

  5. Security Attacks • 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 Henric Johnson

  6. Security Goals Confidentiality Integrity Avaliability Henric Johnson

  7. Henric Johnson

  8. 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 Henric Johnson

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  11. 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 Henric Johnson

  12. Internet standards and RFCs • The Internet society • Internet Architecture Board (IAB) • Internet Engineering Task Force (IETF) • Internet Engineering Steering Group (IESG) Henric Johnson

  13. Internet RFC Publication Process Henric Johnson

  14. Recommended Reading • Pfleeger, C. Security in Computing. Prentice Hall, 1997. • Mel, H.X. Baker, D. Cryptography Decrypted. Addison Wesley, 2001. Henric Johnson

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