Yesterday in class we were talking about Security strategies. I will now explain them.
Security Strategies
Encryption-
This is the process if changing data into a form that can only be read by the person/company receiving the information which then they can translate it using the decryption key. Companies do this so people’s personal information within that company cannot get accessed by just anyone.
Virus, Trojan and Worms-
Virus-
This is a program or a piece of code that can be loaded and run onto your computer without your knowledge. Most viruses make replicates of themselves and attaching themselves onto files.
There are 3 main categories of viruses which are-
Boot sector- If the boot sector is affected then you wont be able to turn your computer on as the Boot sector is the area of the hard drive that is accessed when you first turn your computer on.
File Virus- Infects programs, which then led onto it affecting other documents and programs they are opened or run in.
Macro Virus- These are written using Macro programming Language which affect Microsoft Office programs such as Excel and Word which is mostly found on the internet by downloading free programs.
Trojan-
Normally called a Trojan horse. They aren’t like a virus as they don’t replicate themselves they are just very destructive. Once a Trojan is installed, hackers can access your computer system and files. Normally Trojan horses main use is to allow spammers to send thousands of emails from another computer. The main type of Trojan horse is spyware which secretly gathers user information through the user’s internet but the spyware is usually attached to a piece of shareware or freeware which usually get set off once the program is installed.
Worms-
This is a self-replicating program which uses the resources on one machine to attack other machines. A worm is a normal piece of program code that inserts itself into other programs. This makes it different from a virus.
Denial of Service-
This only happens if you flood a network or server or attempt to disrupt access to a service. Illegal uses of resources can also be result of a Denial of Service. Flooding can be a website or a server.
Firewall-
The purpose of a Firewall is to prevent unwanted intrusions from the internet and other networks. Within the Firewall there are thousands of ports which, each port prevents a certain thing from accessing your computer for example, one would be for the internet and another one could be for the files on your computer.
Have i missed anything out?.
Laura x
