PPT-Security in Operating Systems

CS 111 Operating System Principles Peter Reiher Outline Security goals Access control Cryptography Symmetric cryptography Asymmetric cryptography Security Goals Confidentiality If its supposed to be secret be careful who hears it. 1. 11. I/O Systems. 11.1 Basic Issues in Device Management. 11.2 A Hierarchical Model. 11.3 I/O Devices. 11.4 Device Drivers. Memory-Mapped . vs. Explicit Device Interfaces . Programmed I/O with Polling . 1. 10. File Systems. 10.1 Basic Functions of File Management. 10.2 Hierarchical Model of a File System . 10.3 User’s View of Files. Logical File Organization. Operations on Files. 10.4 . File Directories. Principles and Practice. Tom Anderson. How This Course Fits in the UW CSE Curriculum. CSE 333: Systems Programming. Project experience in C/C++. How to use the operating system interface. CSE 451: Operating Systems. Cryptography, Authentication, . and Protecting OS Resources. CS. . 111. On-Line MS Program. Operating . Systems . Peter Reiher. . Outline. Basic concepts in computer security. Design principles for security. 1. 8. Virtual Memory. 8.1 Principles of Virtual Memory . 8.2 Implementations of Virtual Memory . Paging. Segmentation. Paging With Segmentation. Paging of System Tables. Translation Look-aside Buffers . Seventh Edition. Chapter 7. Device Management. Learning Objectives. After completing this chapter, you should be able to describe:. Features of dedicated, shared, and virtual devices. Concepts of blocking and buffering, and how they improve I/O performance. Eighth Edition. By William Stallings. Operating Systems:. Internals and Design Principles. System Access Threats. Intruders . Malicious Software. Programs that exploit vulnerabilities in computing systems. Dr . Damitha. . Karunaratna. . University of Colombo school of computing. Topics to discuss. What is an operating system(OS)?. Main objectives of an OS. Main functions of an OS. Evolution of OS.. and File Management. Chapter 4: Operating Systems and File Management. 2. Chapter Contents. Section A: Operating System Basics. Section B: Today’s Operating Systems. Section C: File Basics. Section D: File Management. Chapter 8. File Management. Understanding Operating Systems,7e. Learning Objectives. After completing this chapter, you should be able to describe:. The fundamentals of file management . File-naming conventions, including the role of extensions. History and Hardware. 1: Operating Systems Overview. 2. This is the simplest animal with a “brain”. Caenorphabditis elegans. C. elegans.  is one of the simplest organisms with a nervous system. This system comprises 302 neurons the pattern of which has been comprehensively mapped, in what is known as a connectome. . Seventh Edition. Chapter . 2. Memory . Management: . Simple Systems. Understanding Operating Systems, 7e. 2. Learning Objectives. After completing this chapter, you should be able to describe:. The basic functionality of the four memory allocation schemes presented in . Seventh Edition. Chapter . 2. Memory . Management: . Simple Systems. Understanding Operating Systems, 7e. 2. Learning Objectives. After completing this chapter, you should be able to describe:. The basic functionality of the four memory allocation schemes presented in . Chapter Contents. Section A: Operating System Basics. Section B: Today’s Operating Systems. Section C: File Basics. Section D: File Management. Section E: Backup Security. Chapter 4: Operating Systems and File Management.