The threat of online security: How safe is our data?

First of all, i would like to share with all the reader a video clip which i have watch in youtube.com.



Nowadays, people rely on computers to create, store and manage critical information. Consequently, it is important for users to aware that computer security plays a major role in protecting their data from loss, damage, and misuse. Similarly, online security has been online trader’s main concern in protecting their websites from potential threats.

These threats are:

1. MALICIOUS ATTACKS
   
   Attacks that specifically aim to do harm are known as premeditated or malicious attacks. They can be further broken down into attacks caused by malicious code and those caused by intentional misrepresentation. Misrepresentation is most often seen with regard to on line fraud and identity theft (see below). Malicious code, on the other hand, is at the root of so-called "crackings" and "hackings" - notable examples of which include computer viruses, data theft, and Denial of Service (DOS) attacks
   




2. Virus
   
   Which is a potentially damaging computer program that affects, or infects, a computer negatively by altering the way computer works without the user’s knowledge or permission. Once the virus infects the computer, it can spread throughout and may damage files and system software.
   




3. Worm
   
   Worm is a program that copies itself repeatedly, for example in memory or on network, using up resources and possibly shutting down the computer or network. It exploits vulnerabilities in operating systems (OSs), network services, and applications to propagate and cause damage
   
   
   
4. Trojan horses
   
   Trojan horses (named after a Greek myth) is a program that hides within or appear to be legitimate, but in fact contain malware such as keyloggers
   and spyware