1. Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security measures Computer Threats

2. Computer Threats Security measures

3. We need to protect our computer from? Hackers Crackers virus

4. TYPE OF COMPUTER SECURITY HARDWARE SECURITY SOFTWARE / DATA SECURITY NETWORK SECURITY

5. TYPE OF COMPUTER SECURITY

6. 1. HARDWARE SECURITY refers to security measures used to protect the hardware specifically the computer and its related documents. Example : PC-locks, Smart cards Biometric devices.

9. BIOMETRIC DEVICES

10. 2. SOFTWARE / DATA SECURITY refers to the security measures used to protect the software and the loss of data files. Examples : Software - activation code and serial number Data - backup data

11. 2. NETWORK SECURITY refers to security measures used to protect the network system. Example: Firewall Router

12. Computer Threats

13. 1

14. VirusVirus or Worm designed to activate under certain conditionsWorm

15. A Virus or Worm designed to activate at a certain date/time e.g. Friday the 13 th and Michelangelo ( March 6th )VirusWorm Friday the 13 thMichelangelo

16. A small door that covers an opening in a roof or floor.

17. Trapdoor Trapdoor is malicious code that open a back door and allow other people to have unauthorized access to your computer over internet.

18. Trapdoor/Backdoor Backdoor is the most dangerous type of Trojans. Backdoor is installed and launched without the knowledge of the user of the victim computer. Backdoor functions can include: 1. Sending/ receiving files 2. Launching/ deleting files 3. Executing files 4. Deleting data

19. Hacking refer to unauthorized access to the computer system by a hacker. 2

20. 3

27. Computer is used to steal money and information. Stealing of computers especially notebook and PDA. 4

28. Security measures

32. Plain Text encryption descryption troops heading west need more supplies. send general dubois' men to aid TIDIE MRNME REOGO SANOW RSLTP EEEDO SSSNU AHTUD BIENP GODAE PEIDE LNS Plain Text Ciphertext Plain Text cipher = secret plain = normal Plain Text

33. FILE MANAGEMENT DIAGNOSTIC UTILITY FILE COMPRESSION ANTIVIRUS BACKUP

34. is a utility program that we use to protect a computer against viruses

39. A firewall is a software or hardware that secures a network, shielding it from access by unauthorized users.