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Introduction to Computer Security: Components, Threats, Policies, and Mechanisms

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This chapter provides an introduction to computer security, covering the basic components, common threats, policies, and mechanisms. It also discusses operational and human issues in maintaining security.

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Introduction to Computer Security: Components, Threats, Policies, and Mechanisms

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Presentation Transcript

  1. Chapter 1: Introduction • Components of computer security • Threats • Policies and mechanisms • Operational Issues • Human Issues

  2. Basic Components (CIA) https://www.researchgate.net/profile/Ali_Aldallal2/post/What_is_information_security/attachment/59d640f979197b807799d189/AS%3A433099327709184%401480270334665/download/opentext-graphic-for-web-information-security-en.jpg

  3. Integrity • Data integrity (integrity, correctness) • Origin integrity (authentication, trustworthiness)

  4. Encrypt text information in music score, each note corresponds to a letter. --- Schott (1608 – 1666) Text Encryption & Image Encryption Image Encryption with SCAN (Bourbakis)

  5. Information Hiding - Examples • APPARENTLY NEUTRAL’S PROTEST IS THOROUGHLY DISCOUNTED AND IGNORED. ISMAN HARD HIT. BLOCKADE ISSUE AFFECTS PRETEXT FOR EMBARGO ON BY-PRODUCTS, EJECTING SUETS AND VEGETABLE OILS. • A message sent by a spy in World War II. • PERSHING SAILS FROM NY JUNE 1. • Extract the second letter from each word.

  6. Information Hiding - Examples (Maniccam & Bourbakis)

  7. Classes of Threats • Threat: potential violation of security; • Attack: the actual violation; • Attacker: people who execute the violation; http://datasmithnetworks.com/site/wp-content/uploads/2016/06/Screen-Shot-2016-06-16-at-10.25.22-AM.png

  8. Classes of Threats • Disclosure: unauthorized access to information • Deception: acceptance of false data • Disruption: interruption or prevention of correct operation • Usurpation: unauthorized control of a part of a system

  9. Policies and Mechanisms http://images.slideplayer.com/15/4818128/slides/slide_4.jpg

  10. Goals of Security https://image.slidesharecdn.com/securing-microservices-151023111758-lva1-app6892/95/beta-securing-microservices-20-638.jpg?cb=1445599262

  11. Types of Mechanisms http://images.slideplayer.com/16/5133500/slides/slide_30.jpg

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