Computer security

Computer security

1. encryption:

   • We use encryption to send messages in code.
   • We use encryption when we want to tell somebody a message in code with out other people knowing.
   • To encrypt a message you first need to choose/create the code for the encryption.
   • To decrypt a message you will need a key so that you know what the letters/symbols mean.
   • you can tell that a website is using an encrypted message or data by checking if it is https in the web link as the s stands for secure and it is encrypted.
   • Not all websites use encryption because they might not be dealing with personal information.
   • Most people use encryption in passwords and TV.

2. firewall:

   • Prevents harmful data entering your computer.
   • A fire wall controls which programs can send or recive data packets.
   • This stops unauthorized information.
   • If you don't use firewall for your home,business or school then you could/will be sent dangerous or malicious programs and data packets.For larger places such as schools and business you may get a trojan horse.If you don't use firewall then the consequences are your data could be stolen or used for viruses such as a zombie.
   • It controls which programs can send and receive data packets.
   • Firewall is used when program is trying to connect to another network.
   • Is used to protect a computer network from intruders

3. anti-virus:

   • It protects against malicious software.
   • Scans the computer periodically.
   • Needs updating regularly to make sure that it knows the latest threats.
   • This prevents, detects and removes viruses and unwanted programs.
   • This needs to get updated and to scan your device regularly because otherwise there is a risk that you could get an unwanted virus .
   • If you don't use anti-virus software then there is a risk of you getting terrible viruses and data packets.For a larger area you might even get a zombie
   • This is Used to help protect computer networs from intruders.
   • This Scans the computer periodically.
   • It needs updating regularly to make sure that it knows the latest threats.
   • Should be used on email attachments and downloads.
   • If you don't use anti-virus then your files could get infected and the malware will slowly spread to all your files. however if you quarantine the infected file then you can stop the malware from infecting the rest of your files.

4. data packets:

   • you need to make sure that you are in control of what data packets you have sent to your computer as otherwise you could get unwanted viruses and problems on your device.

5. Botnet:

   • A network of privot computers infected with malitiose software and controlled as a group without the owner's knolage, E.G to send SPAM

6. malware:

   • viruses:
     • Trojan hourse:
       • These are viruses that claim to get rid of viruses and problems but instead it adds viruses and unwanted problems to your computer or devise.
     • worm:
       • This does not need to be attached to a existing problem.It is a stand alone malware and it duplicates itself.
     • zombie:
       • A zombie virus is a virus that has been controlled by a hacker and slowly spreads through out a server.

7. consequences:

   • reputation
   • profit

8. Passwords

   • To make your passwords more secure you should try to use symbols, capitals, numbers and lower case letters.
     • 1 2 3 4 5 6 7 8 9 0 - = + ! " £ $ % ^ & * ( ) q w e r t y u i o p a s d f g h j k l z x c v b n m Q W E R T Y U I O P A S D F G H J K L Z X C V B N M [ ] ; ' # , . / { } : @ ~ < > ?
   • NEVER use your name or something too easy for your password.
   • Always make sure that the website you are signing into has a https and the correct web link so that you don't get hacked or have your account and more stolen.
   • Never tell people or share your passwords to anyone even your closest friends.
   • Never write your passwords down as you have the risk of people finding them and doing things without you knowing E.G buying things.
   • If your password is not secure then unauthorised users can get onto your accounts and steal your details , you also have the risk from your money being stolen to your phone numbers.They could also modify or even delete your files.

9. Phishing

   • You should always check that the email is genuine.
   • Where an unauthorised user imposes someone, this could be in the form of an email such as EBAY.co.uk and ask you for your details and then the have access to them without your actual permission.