Operating Systems - Systems Security - Revised

Operating Systems
Free Course
Learn how to secure operating systems from malicious bugs and viruses.
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  • Duration

    2-3 Hours
  • Assessment

  • Certification

  • Responsive

  • Publisher





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The course Operating Systems - System Security will explain to you the methods and techniques that are used to secure operating systems from malicious bugs and viruses. Security has become extremely important in the modern digital age, systems are always on and are mostly interconnected, with hackers and cyber-criminals are always looking for ways to insert malicious programs into vulnerable operating systems security is a must.

The course begins by explaining secrecy, integrity, and availability with regard to security goals. You will learn about the denial of service attacks and the different access control techniques that can be used. Then you will be introduced to information flow policies and leaky states and will also inform you about the difference between the Biba model and Bell-LaPadula module.

In the second module, the course will provide you with in-depth knowledge on buffer overflows and stacks. You will learn about the use of buffer overflows and how an attacker can use these to create an exploit code. You will be able to implement different techniques to overcome buffer overflow vulnerability. This module will finish by explaining libc and 'how to return libc attacks', and what gadgets are in operating systems and how they can be used. This course will be of great interest to computer science students and computer engineers, and anyone who wants to learn more about systems security in computer operating systems.

Prerequisite: The learner will need to have completed the previous courses; Introduction to Operating Systems, Introduction to Memory Management, Introduction to Operating Systems Processes, Introduction to Operating Systems Interrupts and operating systems scheduling, Introduction to Operating Systems - Introduction to Synchronization, Operating Systems - Deadlocks and Threads.

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Learning Outcomes

Having completed this course, you will be able to:

  • Distinguish between secrecy, integrity, and availability with regard to security goals.
  • Define what denial of service attacks means.
  • Explain when access control techniques are used.
  • Describe the components for developing an access control system.
  • Distinguish between DAC, MAC, and RBAC.
  • Explain what a leaky state is.
  • Explain information flow policies.
  • Describe the mandatory access control mechanism.
  • Distinguish between the Biba model and the Bell-LaPadula model.
  • Explain how a stack in a program is managed.
  • Define the use of buffer overflows.
  • Describe how an attacker could create an exploit code.
  • List some techniques to overcome buffer overflow vulnerability.
  • Explain how return to libc' attacks works.


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