Computer Security Basics Pdf

Unchecked, worms can multiply until they fill up a hard disk. With each advance of technology came new threats and attacks. Network Security will introduce useful topics relevant to home networking.

The most elaborate malware can scan a victim machine for links to other machines, then replicate itself to those other machines while working its attack on the victim machine. Some murderers and rapists have gotten away with lighter sentences. Conversely, some organizations that really should know better sometimes display a stunning lack of security. Techniques for protecting your system are called countermeasures.

Computer Security Basics 2nd Edition

Estimates of the size of the computer security market vary. These can also help during times of extreme weather. More recently, skillful intruders are attacking computers with criminal or military goals in mind.

In financial environments, accuracy is usually the most important aspect of security. As the pool of computer users has increased, ways are emerging to illicitly profit off of them. The language used in this book should be easily understood by someone with the reading level of a college freshman. Generally, more information is compromised, corrupted, or lost through ignorance than through malice.

Computer Security Basics 2nd Edition by G.T. Gangemi Rick Lehtinen

And because it really is a small Internet, and what affects one usually affects all, the safer individual users are, the safer the Net is for everybody. In one case, an assistant programmer at a merchant bank diverted eight million pounds to a Swiss account. The new edition builds on the well-established principles developed in the original edition and thoroughly updates that core knowledge.

CIS/CSE 643 Computer Security

Most companies today are adding their own internal security forces. If protection features fail, they wreak havoc with your system, and they open security holes. While these are probably not the best place to start learning about security, you may find them useful or interesting after you have become more familiar with some of the basics. It tells you what you need to know to understand the basics of computer security, and it will help you persuade your employees to practice safe computing.

Computer security is a multibillion dollar industry that addresses a threat that now impacts everyone. The story of network attacks, bugs, viruses, and criminal actions stretches as far as the computer industry itself. If you use a computer of any kind, anywhere, computer security not only affects you, 150 masterpieces of drawing pdf it is your responsibility.

1. Introduction - Computer Security Basics 2nd Edition Book

Messages can be intercepted, misrouted, and forged. Manufacturers then create patches intended to counter the attacks. With Safari, you learn the way you learn best. Exploiting vulnerabilities. It originally meant anyone with a strong interest in computers and an eagerness to experiment with them and test their limits.

Introduction to Computer Security

Web Security will introduce concepts which apply specifically to the world-wide-web. Just as corporate and government users are bonding together to provide mutual protection, however, a huge emerging class of users is expanding rapidly, and for the most part they are unprotected. Attacks of those kinds can typically be mounted only by sophisticated attackers who have substantial skill and resources in computing power, money, time, and personnel behind them. Any book on the subject of security is likely to enlighten the reader on a variety of nasty things that could potentially happen to him or her.

In areas where obtaining stable power is a problem, facilities employ back-up generators. Vulnerabilities continue to be sniffed out by attackers who create viruses and worms to exploit them. Early on, computer security specialized in keeping the glass houses in which the computer core was positioned safe from vandalism, along with providing constant cooling and electricity. With this method, a code is calculated and appended to a message when that message is sent across a network. Ordinary computer users, operators, and other people on your staff can also be bribed or coerced into giving away passwords, opening doors, or otherwise jeopardizing security in your system.

Remember that security means more than keeping the bad guys out. You can also plan for a disaster by backing up critical data off-site and by arranging for the use of a backup system that can be used if an emergency does occur. Who are you going to call? Media is useful only if it is usable. With pressure from the government, the courts, and the press, security now seems to have graduated to a necessary evil.

CIS/CSE 643 Computer Security

Your own assessment of what type of security your organization requires will influence your choice of the particular security techniques and products needed to meet those requirements. We will make our best attempt to define security-related terms and other jargon in a concise, coherent manner. It also means doing what you can to protect, or at least to avoid endangering, the network and computers used by yourself and others. More typically, they break into systems for the challenge of defeating each new security feature they encounter. As computers became more dispersed, security became more of an issue of preserving data and protecting its validity, as well as keeping the secrets secret.

Lecture Notes

You can institute policies that guard against hazards posing special dangers to computers such as smoking or soda spills. Often these attacks coincide with national holidays or protests. That said, there is evidence that some nations increasingly engage in routine interruption of communications within other nations, apparently with the intention of advancing political agendas. Information can be beamed into countries that suppress it. Information Sharing and Analysis Centers.

Because of its special concern for classified information relating to national defense and intelligence, the U. The government has a great many secrets millions of new pieces of information are classified each year! Most attacks today are run by unsophisticated youth who learn a few tricks and gather a few scripts from true gurus, and then do what amounts to vandalism for the thrill of it. You can minimize the chance that the damage will be severe e.

Physical security is the protection of physical computer equipment from damage by natural disasters and intruders. Tip Media is useful only if it is usable. Computer crime is lucrative, and, unlike many other types of crimes, can be carried out in a tidy, anonymous electronic fashion.

Emanation vulnerabilities. These values are incorporated into procedures and policies that make computer security a priority from the top down. Even though there has been substantial publicity in recent years about computer system risks and attacks, it turns out that many organizations are unwilling to report system intrusions. The Where to Go from Here section will mention some more advanced concepts of security and will provide links to articles on Wikipedia, other Wikibooks, and external links that discuss security.

Introduction to Computer Security

Computer Security Basics 2nd Edition

The computer may have crashed. Many people have multiple computers in their home and use a router to connect all of them to the Internet simultaneously. Although most security mechanisms protect best against outside intruders, survey after survey indicates that most attacks are by insiders. Data is available when it is accessible by authorized users in a convenient format and within a reasonable time. These topics include the encryption of data, setting user account controls and ensuring your computer is physically secure, to prevent theft of your important or sentimental data.