Introduction-to-Operating-System-Security.pptx

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1. Introduction to Operating System Security Operating system security is crucial in today's digital landscape. It involves protecting the core components of a computer system from unauthorized access, data breaches, and cyber threats.

2. Principles of Operating System Security 1 Least Privilege Granting users and processes the minimum required permissions to perform their tasks, reducing the risk of unauthorized actions. 2 Defense in Depth Implementing multiple layers of security controls to create a comprehensive defense against threats. 3 Secure Configuration Ensuring that the operating system and its components are properly configured to minimize vulnerabilities.

3. Access Control Mechanisms Authentication Verifying the identity of a user or process before granting access to the system. Authorization Determining the specific permissions and actions that a user or process is allowed to perform. Auditing Monitoring and logging user activities to detect and investigate potential security breaches.

4. Authentication and Authorization Password-based Authentication Traditional method of verifying user identity using a unique username and password combination. Biometric Authentication Identifying users based on unique physical or behavioral characteristics, such as fingerprints or facial features. Multi-factor Authentication Combining two or more authentication methods to enhance security and reduce the risk of unauthorized access.

5. Secure Software Design 1 Secure Requirements Identifying and defining security requirements early in the software development lifecycle. 2 Secure Coding Practices Implementing best practices for secure coding, such as input validation, error handling, and secure communication. 3 Secure Testing Thoroughly testing the software for security vulnerabilities and addressing them before deployment.

6. Vulnerability Management Patching Regularly applying security updates and patches to address known vulnerabilities in the operating system and software. Vulnerability Scanning Continuously scanning the system for potential vulnerabilities and identifying areas that need attention. Risk Assessment Evaluating the potential impact and likelihood of security vulnerabilities to prioritize mitigation efforts.

7. Cryptography and Secure Communication Encryption Protecting data confidentiality by converting it into a secure, unreadable format during transmission or storage. Digital Signatures Ensuring the integrity and authenticity of data by verifying its source and confirming that it has not been tampered with. Secure Protocols Implementing secure communication protocols, such as HTTPS and SSH, to protect data in transit from eavesdropping and attacks.

8. Conclusion and Best Practices 1 Holistic Approach Adopting a comprehensive approach to operating system security that addresses multiple layers of protection. 2 Continuous Improvement Regularly reviewing and updating security measures to stay ahead of evolving threats and vulnerabilities. 3 User Awareness Educating and training users on security best practices to create a strong security culture.