What is Computer Security Threats & Types fairyage

WHAT IS COMPUTER SECURITY THREATS + TYPES

COMPUTER SECURITY THREATS...

Computer security threat may be a computer program, an event or even a person which causes loss of data, affecting the working of a computer and stealing of information.

SOME TYPE OF THREATS...

Computer systems are vulnerable to many threats ranging from errors, harming stored data, information or corrupting programs installed on the computers. The following are some common types of threats to the computers:

•     Virus
•     Worms
•     Hackers
•     Adware

VIRUS...

Computer virus is the most common and well known computer security threat. A computer virus is a program written intentionally to alter the way a computer operates, without the permission or knowledge of the user. A virus replicates and executes itself by attaching the copies to other files such as program files or documents.

WHEN ACTIVATED A VIRUS MAY:

    Damage or delete files
    Erase data in hard disk
    Cause erratic system behaviour
    Display annoying messages, etc.

WORMS...

Computer worms are malicious programs that replicate and spread independently and harm the computer. Worms spread through network and over the internet to computers that are connected to the Internet. Worms can also spread by copying themselves from disk to disk or by e-mail. SQL Slammer, The Blaster worm, Sasser worms, Melissa and Iloveyou are examples of computer worms.

COMPUTER WORMS CAN:

•     Destroy files in the system
•     Slow down the computer
•     Cause some programs to stop working

ADWARE...

Adware is a software which automatically plays, displays, or downloads advertisements to a computer usually without user's knowledge. These advertisements can be in the form of a pop-up. They record user's behaviour on the internet, display ads and can even download other malicious software on to the computer.

They may also be in the user interface of the software or on a screen presented to the user during the installation process.

HACKERS...

Hacking can be defined as the unauthorized use of computer, network and its resources. People who indulge themselves in computer hacking activities are called Hackers. Hackers are computer experts who use their expertise for malicious purposes.

HACKER STEALS:

•     Client or customer information
•     Credit card details and social security numbers, for identity fraud or theft
•     Passwords
•     E-mail addresses, which may be used for spamming.

INDICATORS OF SECURITY THREATS...

•     The computer runs slower than usual.
•     The computer locks up or stops responding.
•     The computer suddenly restarts on its own.
•     Frequently used programs become suddenly slow to load and operate.
•     Applications and disk drives are suddenly inaccessible.
•     Unusual error messages appear.
•     Unexpected icons appear on the desktop.
•     Antivirus software is disabled or does not run.

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