Operating Systems May Use The Following Mechanism

A computer is secure if you can depend on it and its software to behave as you expect I this assignment I will writer about how Linux provides security to you information. The major technical areas of computer security are usually represented by CIA confidentiality, integrity, and authentication or availability. It means that information cannot access by unauthorized people.

All operating systems must provide some measure of security to protect the users accounts from unauthorized access. Hacking seems to be the national pastime these days and when this is a national pastime people need to make their computers/accounts more safe. Security warns you of websites which could cause viruses also if the computer has an virus the security system will remove the virus. The most important thing the security protects is information and data that is stored in the computer system.

One of the important part of system administration should be secure, so it is very important to understand which factors can affect security inside and outside our system. There are many key decisions that have to be made, for example, what server operating system should a system use to which

Privilege Escalation – when a user gets access to more resources or functionality than they are normally allowed, which is most often through known exploits or zero-day attacks against the local OS

i) Memory : cache server (holds recently acesed web pages in its RAM, for spedier aces

As basic users, security is one feature that most of us overlook when it comes to operating systems until it is too late. In this paper we will discuss the security flaws within the Windows Operating system, and then discuss countermeasures to fix the system flaw.

type of access control by which the operating system constrains the ability of a subject or initiator to access or generally perform some sort of operation on an object or target. In practice, a subject is usually a process or thread; objects are constructs such as files, directories, TCP/UDP ports, shared memory segments, IO devices etc. Subjects and objects each have a set of security attributes. Whenever a subject attempts to access an object, an authorization rule enforced by the operating system kernel examines these security attributes and decides whether the access can take place. Any operation by any subject on any object will be tested against the set of

Computer systems evolve over time in response to new requirements, businesses rarely have a blank slate to work with – so compromises and security gaps will develop, it is almost guaranteed.

The task of implementing a protection scheme that will provide controlled access to specific files in a system is not only an important but also a necessary task to ensure that the integrity as well as the availability of that file is maintained throughout. This paper is designed to put into perspective a protection scheme to facilitate the scenario where a system has 5000 user and 4990 of those users will need to have access to a particular file within the system. It will also provide clarity on Access control list (ACL’s) their roles as well as the different flavors available. It will also try to prove that proper implementation and utilizations of groups within a security scheme provides not only organization and

System/application attacks fall within three categories: denial or destruction, alteration, and disclosure. This paper will cover some common system/application domain vulnerabilities: unauthorized physical and logical access to resources, weaknesses in server operating system and application software, and data loss.

Getting a failing result after running “-c” option should catch user’s attention. That is because if the user did not make any change on these file, it is possible that an unauthorized party modifies the file. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

First, in traditional storage systems, privacy and confidentiality are compromised when an attacker learns the hash value of a file and gains access to the entire file from the server. For example, Dropbox uses Secure Hash Algorithm 256 (SHA256) in a straightforward manner; thus, it is possible for an attacker to obtain hashes for confidential files of others. Using the hash, a hacker can easily download an unauthorized file from the server. A practical way for performing this hack is demonstrated by the use of Dropship application programming interface (API) utilities for Dropbox which allows a hacker to download confidential files of others from Dropbox servers by obtaining the file hashes. This is comparatively easy to obtain, and exploiting the weak client-side deduplication technique that is applied [4].

Three operating systems discuss in this paper each have their advantages and disadvantages from one another. The biggest advantage for Microsoft is the widespread use and compatibility with most every type of program out there. If you 're a Linux fan then you appreciate not only the price which is usually free but also that it is

What is Operating System Security, Operating system security is the process of ensuring OS integrity, confidentiality and availability also OS security refers to specified steps used to protect the OS from threats, viruses, worms, malware or remote hacker. OS security include all avoiding-control techniques, which safeguard any computer information from being stolen, edited or deleted if OS security is included. OS security allows different applications and programs to perform required tasks and stop unauthorized interference. OS security may be applied in many ways. We 're going to discuss following topics in this article. A brief description about security and what are the types of encryption and what is Authentication, One Time passwords, Program Threats, System Threats and Computer Security Classifications.

This Report will give an overview of Linux security and the features of SELinux (Security Enhanced Linux). This report will be split into 4 sections, Section 1 will be the introduction that will describe what I am being asked to undertake for this coursework. Section 2 will be on Linux security that will have a description of a Discretionary Access Control (DAC) and Mandatory Access Control, along with a comparison of them both. Section 3 will be the Apache server directory configuration and shell script, this will show an account of my work on the configuration of the serving directory in order to allow pages to be served using the apache web server while SELinux is enabled and in enforcing mode. This section will also include an account of a bash script shell that will test the security configurations. This section will be presented in the report with the use of screenshots along with a detailed description of the commands performed and what the screenshots show. Section 4 will contain the conclusion and this will include my thoughts on the work that I have undertaken and on the capabilities of SELinux.