Protection and Security in Modern Operating Systems

Protection and Security in Modern Operating Systems


Protection and Security in Modern Operating Systems

Protection and security are critical components of modern operating systems, ensuring that programs, processes, and users can operate within a controlled environment while minimizing unauthorized access and vulnerabilities. The principles of domain- and language-based protection provide structured methods for managing access control. Domain-based protection defines the access rights assigned to users and processes within a particular domain, allowing for restricted and controlled interactions with system components (Silberschatz et al., 2021). Language-based protection, on the other hand, leverages programming language constructs to enforce security policies at the code level, reducing the potential for security breaches. The access matrix model is a widely used mechanism for specifying and enforcing access rights. This model defines a structured approach where each row represents a subject (user or process), each column represents an object (resource), and each cell specifies the type of access allowed (Tanenbaum & Bos, 2022).

Security mechanisms extend beyond access control models to ensure comprehensive protection against threats targeting software, hardware, and network infrastructures. System security focuses on enforcing authentication, encryption, and intrusion detection to prevent unauthorized system modifications. Encryption methods, such as AES and RSA, protect sensitive data by transforming it into unreadable formats unless decrypted with proper keys (Stallings, 2018). Program security incorporates secure coding practices, buffer overflow prevention, and privilege separation to safeguard applications from exploitation (Bishop, 2019). Network security includes firewalls, intrusion prevention systems, and secure communication protocols such as Transport Layer Security (TLS) and Secure Shell (SSH) to protect data transmission from interception and unauthorized access (Kurose & Ross, 2021). Collectively, these security measures help establish a resilient computing environment that mitigates risks from both internal and external threats.

 


Link: https://drive.google.com/file/d/1w0co3QATIVTapeiuA1e-70h5B8Isigid/view?usp=sharing

References

Bishop, M. (2019). Computer security: Art and science (2nd ed.). Addison-Wesley.

Kurose, J. F., & Ross, K. W. (2021). Computer networking: A top-down approach (8th ed.). Pearson.

Silberschatz, A., Galvin, P. B., & Gagne, G. (2021). Operating system concepts (10th ed.). Wiley.

Stallings, W. (2018). Cryptography and network security: Principles and practice (7th ed.). Pearson.

Tanenbaum, A. S., & Bos, H. (2022). Modern operating systems (5th ed.). Pearson.



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