View Full Version : Computer Security
04-10-2009, 03:40 PM
Computer security is a field of computer science concerned with the control of risks related to computer use. The means traditionally taken to realize this objective is to attempt to create a trusted and secure computing platform, designed so that agents (users or programs) can only perform actions that have been allowed.
04-11-2009, 06:40 AM
Computer security is a branch of technology known as information security as applied to computer(s). The objective of computer security can include protection of information from theft or corruption, or the preservation of availability, as defined in the security policy.
Computer security imposes requirements on computers that are different from most system requirements because they often take the form of constraints on what computers are not supposed to do. This makes computer security particularly challenging because it is hard enough just to make computer programs do everything they are designed to do correctly. Furthermore, negative requirements are deceptively complicated to satisfy and require exhaustive testing to verify, which is impractical for most computer programs. Computer security provides a technical strategy to convert negative requirements to positive enforceable rules. For this reason, computer security is often more technical and mathematical than some computer science fields.
06-08-2009, 04:34 AM
Computer security is a field of computer science concerned with the control of risks related to computer use
The means traditionally taken to realize this objective is to attempt to create a secure computing platform, designed so that agents (users or programs) can only perform actions that have been allowed. This involves specifying and implementing a security policy. The actions in question can be reduced to operations of access, modification and deletion. Computer security can be seen as a subfield of security engineering, which looks at broader security issues in addition to computer security.
In a secure system the legitimate users of that system are still able to do what they should be able to do. While one might be able to secure a computer beyond misuse using extreme measures (locked in a vault without any means of power or communication for example), this would not be regarded as a useful secure system because of the above requirement.
It is important to distinguish the techniques employed to increase a system's security from the issue of that system's security status. In particular, systems which contain fundamental flaws in their security designs cannot be made secure without compromising their utility. Consequently, most computer systems cannot be made secure even after the application of extensive "computer security" measures.:p:p:p
01-22-2010, 03:36 AM
Computer security is a branch of computer technology known as information security as applied to computers and networks. The terms computer system security, means the collective processes and mechanisms by which sensitive and valuable information and services are protected from publication, tampering or collapse by unauthorized activities.
01-23-2010, 02:53 PM
Why is computer security so easy to bypass.
In Xp you can lock your files and folders from other users so they cant view them but if you attached the hard drive with xp on it to a vista pc or laptop vista will bypass xp,s security and let you view all files.
Why is is so easy to bypass vista passwords too And why is it that you can use a usb device to take controll and get sensative data from pcs and laptops
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