System Security

System Security

1. Malware

   • Viruses
     • A virus is a small program which aim to cause physical harm to the computer system,There are 3 types of viruses: Standard,Worm and trojan.A stand virus hide sin files and replicates themselves in order to spread into other programs, trying to delete data, a worm virus doesn't damage data but instead multiples itself to use more and more of the computers resources, a trojan virus is usually disguised as something like a game and in the background deletes files and causes harms
   • Spyware
     • Spywares aim is to spy on the user and send back as much information about them as possibles,such as passwords or usernames.A common example of spyware is a key logger
   • Pharming
     • This malware seeks to change the ip address stored in the DNS to another ip address so that the user is sent to a phoney website
   • Adware
     • This type of malware doesn't delete or corrupt a systems data,instead it aims to download and display unwanted aderts

2. Phishing

   • It is quit elike real fishing where you cast out a rod with some bait on it, the try to impresonate legitmate companies tog et you tog ive away your personal details for example a suer could be called from the fake bank and they then give them there details

3. Brute force Attacks

   • Repeated attempts by crimnals to log into an account, untill access is granted

4. Dos

   • This methods seeks to bring down websites by using up the web server's resources, this is done by acquring multiple computers to repeatedly try to access a website,theis sudden increase in traffic puts the web server under pressure and cause the server's to crash.

5. SQL Injections

   • Structured query language is used to lookup data in a database,WIth SQL injection, you can bolt on some SQL to the end of your passowrds this will then alter the SQL statementand allows you to access the accounts of other users