►A Computer Virus is a computer program or code that can replicate itself and spread from one computer system to another system.
A computer virus has the capacity to corrupt or to delete data on your computer and it can utilize an e-mail program to spread the virus to other computer systems. In the worst case scenario, it can even delete everything on your hard disk. The purpose of it is to disrupt the operation of the computer or the program.
►Some examples of Computer Virus are Trojan viruses. stealth viruses, worms, malware (malicious software), Disk Killer, Stone virus, Sunday, Cascade, Nuclear, Word Concept, etc.
►Malware, short for malicious software, is any software used to disrupt computer operation, gather sensitive information, or gain access to private computer systems. It can appear in the form of executable code, scripts, active content, and other software.
►Antivirus Software is used to scan the hard disk to remove the virus from them. Some of the famous anti – viruses available are Avast!, Norton, Avira, Kaspersky, AVG, etc.
►The Creeper virus was the first virus detected on ARPANET, in the early 1970s.
►A person who* uses his or her expertise to gain access to other people’s computers to get information illegally or do damage is a Hacker.
►Authorization is the function of specifying access rights to resources related to information security and computer security in general and to access control in particular. More formally, "to authorize" is to define an access policy.
►Authentication is the act of confirming the truth of an attribute of a single piece of data or entity. It might involve confirming the identity of a person by validating their identity documents, verifying the validity of a website with a digital certificate, tracing the age of an artifact by carbon dating, or ensuring that a product is what its packaging and labelling claim to be. In other words, Authentication often involves verifying the validity of at least one form of identification.
►Phishing is the attempt to acquire sensitive information such as usernames, passwords, and credit card details (and sometimes, indirectly, money) by masquerading as a trustworthy entity in an electronic communication.
►A Spoofing attack is a situation in which one person or program successfully represents oneself as another by falsifying data and thereby gaining an illegitimate advantage.
►Browser Sniffing is a set of techniques used in websites and web applications in order to determine the web browser that a visitor is using, and to serve browser-appropriate content to the visitor.
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