Protection and security in os pdf
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Operating System Security
Protection refers to a mechanism which controls the access of programs, processes, or users to the resources defined by a computer system. We can take protection as a helper to multi programming operating system, so that many users might safely share a common logical name space such as directory or files. Role of Protection: The role of protection is to provide a mechanism that implement policies which defines the uses of resources in the computer system. Some policies are defined at the time of design of the system, some are designed by management of the system and some are defined by the users of the system to protect their own files and programs. Every application has different policies for use of the resources and they may change over time so protection of the system is not only concern of the designer of the operating system.
Protection and Security in Operating System
The operating system provides measures to prevent the interference with the utilization of logical and physical resources, which are known as security and protection. The security and protection are sometimes interchangeably used as they do not sound very distinctive. Although, the terms security and protection are majorly different. The main difference between security and protection lies within the fact that the security handles the external information threats in the computer systems whereas the protection deals with the internal threats. Basic Security Protection Basic Provides the system access to the legitimate users only. Controls the access to the system resources.
Operating System Security
Skip to search form Skip to main content You are currently offline. Some features of the site may not work correctly. DOI: Operating systems provide the fundamental mechanisms for securing computer processing. Since the s, operating systems designers have explored how to build "secure" operating systems - operating systems whose mechanisms protect the system against a motivated adversary.
Embedded systems security provides mechanisms to protect an embedded system from all types of malicious behavior. Embedded systems security is a cybersecurity field focused on preventing malicious access to and use of embedded systems.
Solutions to Practice Exercises
Protection and security requires that computer resources such as CPU, softwares, memory etc. This extends to the operating system as well as the data in the system. This can be done by ensuring integrity, confidentiality and availability in the operating system. The system must be protect against unauthorized access, viruses, worms etc. A threat is a program that is malicious in nature and leads to harmful effects for the system. Viruses are generally small snippets of code embedded in a system. They are very dangerous and can corrupt files, destroy data, crash systems etc.