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

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

Computer security means protecting our computer systemand the information they contain

against unwanted access, damage, destruction or modification.

Security measures

Computer Threats

Page 2: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security

Computer Threats

Security measures

Page 3: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security

We need to protect our computer from?

• Hackers

• Crackers

• virus

Page 4: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security

TYPE OF COMPUTER SECURITY

HARDWARE SECURITY

SOFTWARE / DATA SECURITY

NETWORK SECURITY

Page 5: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security

TYPE OF COMPUTER SECURITY

Page 6: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security

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.

Page 7: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security
Page 8: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security
Page 9: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security

BIOMETRIC DEVICES

Page 10: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security

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

Page 11: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security

2. NETWORK SECURITY

• refers to security measures used to protect the network system.

• Example:

Firewall

Router

Page 12: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security

Computer Threats

Page 13: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security

1

Page 14: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security

Virus or Worm designed to activate under certain conditions

Page 15: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security

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

Page 16: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security

A small door that coversan opening in a roof or floor.

Page 17: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security

Trapdoor

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

Page 18: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security

Trapdoor/BackdoorBackdoor 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

Page 19: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security

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

2

Page 20: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security

3

Page 21: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security
Page 22: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security
Page 23: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security
Page 24: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security
Page 25: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security
Page 26: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security
Page 27: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security

Computer is used to steal money and information.

Stealing of computers especially notebook and PDA.

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Page 28: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security

Security measures

Page 29: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security
Page 30: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security
Page 31: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security
Page 32: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security

Plain Text Plain Text

Plain Textencryption

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

CiphertextPlain Text

cipher = secretplain = normal

Plain Text

Page 33: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security

FILE MANAGEMENT

DIAGNOSTIC UTILITY

FILE COMPRESSION

ANTIVIRUS

BACKUP

Page 34: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security

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

Page 35: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security
Page 36: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security
Page 37: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security
Page 38: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security
Page 39: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security

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

Page 40: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security
Page 41: Computer security means protecting our computer system and the information they contain against unwanted access, damage, destruction or modification. Security

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