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Lesson-1 Computer Security Threats to computer Security What do they mean by a threat? A threat, in the context of computer security, a | You will learn refers to anything that has the potential to ¥ Threats to computer Y Virus and its types Y Anti Virus software cause serious harm to a computer system. A threat is something that may or may not and examples v Firewall and its use happen, but has the potential to cause serious Y Cyber Crime and damage. Threats can lead to attacks on computer Computer Ethics v Hackers and crackers systems, networks and more. A threat can be Y Cyber law and important either “intentional"(i.e., intelligent; e.g., an individual ¥ Backup and Restore cracker ora criminal organization) or "accidental" (e!) (e.g., the possibility of a computer malfunctioning, or the possibility of a natural disaster such as an earthquake, a fire, or a tornado) or otherwise a circumstance, capability, action, or event. Virus Computer Virus are nothing but computer program that do unwanted things with your computer resources e.g. you are working on PC and you are repeatedly receiving annoying message Viruses: A virus is a small piece of software that piggybacks on real programs. For example, a virus might attach itself to a program such as a spreadsheet program. Each time the spreadsheet program runs, the virus runs, too, and it has the chance to reproduce (by attaching to other programs) or wreak havoc. E-mail viruses: An e-mail virus travels as an attachment to e-mail messages, and usually replicates itself by automatically mailing itself to dozens of people in the victim's e-mail address book. Some e- mail viruses don't even require a double-click -- they launch when you view the infected message in the preview pane of your e-mail software. Page |1 
