OSI Security Architecture.ppt - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. To understand it, read 12 Advantages and Disadvantages of OSI model Layered Architecture. 1. A potential for violation of security, which exists when there is a circumstance, capability, action, or event that could breach security and cause harm. Security Mechanism: A process that is designed to detect, prevent or recover from a security attack. Further reading: This OSI model layered architecture has its own pros and cons. Similarities and Differences between OSI and TCP/IP Model. The OSI Security Architecture is a framework that provides a systematic way of defining the requirements for security and characterizing the approaches to satisfying those requirements. The OSI architecture is an international standard, computer and communications vendors have developed security features for their products and services that relate to this structured definition of services and mechanisms. The OSI model is very complex. Furthermore, because this architecture was developed as an international standard, computer and communications vendors Security Attacks 4. If extra data slips in, it can be executed in a privileged mode and cause disruption This tutorial is the third part of the article. It explains the seven layers of OSI model in details. Hope this is helpful to get a clear understanding of OSI … The OSI security architecture focus on security attack, mechanism, and services. Security Mechanisms These slides are based on Lawrie Brown’s slides supplied with William Stallings ’s book “Cryptography and Network Security: Principles and Practice,” 5th Ed, 2011. OSI Security Architecture These can be defined briefly as follows: Threat. OSI Security Architecture 3. Other parts of this article are following. Like the OSI model from which it draws inspiration and purpose, the security stack does not define inviolable boundaries or gates, nor does it imply that one layer of security cannot exist without another. The OSI security architecture focuses on security attacks, mechanisms, and services. Though there are many layers, some of the layers like the session layer and presentation layer have very little functionality when practically deployed. Chapter 5: Security Models and Architecture 189 All-In-One / CISSP Certification All-in-One Exam Guide / Harris / 222966-7/ Chapter 5 application software instructions that are processing the data, not the computer system itself. Compare and contrast OSI and TCP/IP models. I have touched different OSI layers and their functions. OSI Seven Layers Model Explained with Examples. That is, a threat is Security Services 5. It is a 7 layer architecture with each layer having specific functionality to perform. It has been developed by ISO – ‘International Organization of Standardization‘, in the year 1984. OSI Reference Model - Title: ECE 478/578 Lecture 2 Subject: Computer Networks Author: Kevin M. McNeill, Ph.D. Last modified by: ABShafee Created Date: 6/10/1995 2:17:02 PM These can be defined briefly as fallows: Security Attack: Any action that compromise the security of information owned by an organization. The initial implementation was cumbersome, slow and costly. The document defines security attacks, mechanisms, and services, and the relationships among these categories. ITU-T4 Recommendation X.800, Security Architecture for OSI, defines such a systematic approach.5 The OSI security architecture is useful to managers as a way of organizing the task of providing security. 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