The Problem Of Computer Security

Despite the presence of network security devices such as firewalls and other security appliances, today's corporate networks are still vulnerable to both internal and external attacks by hackers intent on creating havoc. By proactively

Back in 1983 Department of Defense published series of book about security which had color code! The red book was related to network security and the security of system was discussed in the orange book. Base on the orange book an operating system based on its secure design and implementation can be in one of these categories: D, C1, C2, B1, B2, B3, and A1 which is from no security up to Verified protection. Base of Orange book and another evaluation system called Common Criteria both Linux and Windows has similar security. And most security based on how one server implements and being used on each platform.

We have all herd of security breaches on corporate servers that has exposed personal and important information that should be secure. Hackers and criminals have been doing this since the invention of the internet and has only increased along with our use and dependency on networks. It is becoming more apparent that company’s need to protect their windows and Unix/Linux servers from known or unknown shortcomings and vulnerabilities from hackers who want to steal information for malicious purposes. Hackers will use codes or malware to corrupt network or operating system of the target company, with the intent to steal information such as proprietary information, personal information including social security numbers, contact information, or any

When installing any operating system regardless of whether it is a Linux or windows based operating system it is essential that steps are taken to ensure the security of the operating systems. Ensuring the security of an installed operating system before for it is put into use is known as system hardening. System hardening is done by taking known vulnerabilities in an operating system and making security enhancement to mitigate these vulnerabilities. Thus, it is important to know the vulnerabilities which are posed by each operating system and the ways in which they can be mitigate. Below are three common vulnerabilities in windows operating system and recommendations on how to mitigate them.

Security Dilemma is a term referring to the process of situation that occur when a state or coalitions make actions to increase its security such as strengthening their military, which causes or leads other states and alliances to respond with similar actions that overall increases conflict and tensions. Often, security dilemma is introduced as either a cause or a factor that facilitates war in concrete situations. Security dilemma has been developed both mathematically and qualitatively to deal with problem instability amongst nations of states and anarchy. The means of security, refers to at a minimum, the deterrence of defeat. The means of security are like the means of exchange or the means of production, as they are typically military force and force projection capability, but can also be economic assets like oil emerges, territory and population. The issue is how these different components interact in a situation where one can assume every state wants to maximize its security if nothing else and what the incentives may be that lie behind these issues. The incentives can range from purely defensive to an offensive capacity to expand. This works best in a balance of power, an unstable balance of power creates rising and declining power, when a power balance tends to destabilize, rising and declining powers take steps to guarantee or maximize security. The process of unstable balance of power or rising and declining of power cause an endless cycle of issues and conflict.

Every operating system has an inherent operating system security which protects the computer, the system itself, and the user of the computer by ensuring the integrity, confidentiality, and

There are special viruses that creates different types of malicious problems on a network or computer, for instance it will create or open programs to perform tasks. Viruses is also used for denial of service attacks, password cracking and many more. This can be fought against by having a reliable protection service; it is safer if this is taken from the provider itself.

Server Hardening is the process of enhancing server security through a variety of means which results in a much more secure server operating environment. This is due to the advanced security measures that are put in place during the server hardening process. There are several key requirements you must meet to ensure that the server hardening processes described in this section achieve their security goals:

There has been developed even more severe and dynamic viruses that are used to hack various institution. A very good example is that of the Stuxnet virus believed to have been penetrated to the Iranian institutions by an adversary (unsubstantially claimed to be Israel or U.S.A) that is able to penetrate various Iranian systems and control their nuclear reactors, destroy oil pipelines and so on. The Iranian government has not been able to counter this virus as it is extensively dynamic and utilizes system weakness points or holes known as zero days. It has been used to shut more than a thousand of their systems and thus the need for them to redesign their security system and

We are caught in a moment of time in our nation 's history where misfortunes, mismanagement, corruption, and leftwing ideology come together in a powerful concurrence of circumstances that leave our once dynamic nation at risk for disaster.

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.

Over the past decade computer networks have rapid growth, but the computer security became a critical problem for computer systems. Thus in the recent years various soft computing technique based methods were proposed to detects the growth of intrusion. Also many researchers have reported that the large set of pattern classifications and machine learning algorithms are trained and testing is made on the knowledge discovery data intrusion detection dataset is unsuccessful in finding the remote-to-local attacks and user-to root attacks. Moreover Hyperbolic Hopfield Neural Network(HHNN) based Intrusion Detection Systems (IDSs) detection stability, detection ratio, particularly low-frequent attacks are still required to be improved. Thus this paper proposes a new method known as K-Medoids-HNNN using the technique HHNN and K-Medoids clustering. This system achieves the higher intrusion detection rate, detection stability and less false positive rate. At first the proposed system implements the K-Medoids clustering technique on the various training subsets. Afterwards a mono HHNN model is trained using the different training subsets to detect the intrusion. The experimental results shows the K-Medoids-HHNN approach achieve better results rather than other framework.

Any Operating System must provide some degree of separation, memory protection, and access control. On the other hand, since we rely on a trusted OS for security, it must or

Worms effect the computers that are on the same network. A worm will consume bandwidth and will spread to other computers on a network. Worms can also cause a server to crash or make a user’s files unusable or corruption. They can also create a backdoor on a target computer. Rootkit will run its utilities on your computer without your knowledge of it even being there, they are designed to avoid detection. A rootkit, like a worm, can also create a backdoor on target computers allowing a hacker to send things such as spam or emails that can use a target computer to perform a denial-of-service attack on servers. A zombies will open a backdoor on an affected computer to allow predators to use it for malicious purposes without the owner’s knowledge. A Browser hijacker has the ability to change a home page or search page in your browser. An email viruse can potentially harm a computer when an effected email is open opened. The mousetrap ping happens when a website uses a script preventing the Internet user from leaving a website. Last but not least, spam comes in the form of an email usually and it’s junk or bulk emails that come from random senders known as spammers.

Majority of the computers sold worldwide are represented by portable computers nowadays. An old cliche of computer security is that if an attacker has access to a computer, that attacker has access to the data of that computer. The issues that the specialists in IT domain are facing is to protect the data that may end up in an attacker hands. If a laptop is lost or stolen, the data on it may end up in unauthorized third party 's hands. An average price to pay for an organization if it loses a computer may be very expensive. The number one expense the company will have to face isn 't replacing the laptop but figuring out the information data that was lost and how it can harm the organization if the information ends up in competitors posession.