Computer Security

Computer Security

It is also known as Cyber Security or IT Security, Computer security is a branch of information technology known as information security’, which is intended to protect computers.

There are four primary methods to provide protection to computer such as

1. System Access Control
2. Data Access Control
3. System and Security Administration
4. System Design

Sources of Cyber Attack

The most potent and vulnerable threat of computer users is Virus attacks. A computer virus is a small software program that spreads from one computer to another and that interferes with computer operation. The sources of attack can be : (1)Downloadable Programs, (2) Cracked Software, (3) Email Attachments, (4) Internet, (5) Booting from unknown CD


Malware stands for malicious software. It is a broad term that refers to a variety of malicious programs that are used to
damage computer system, gather sensitive information or gain access to private computer systems.
It includes computer virus, worms, trojan horses, rootkits,spyware, adware. etc.

Some Other Threats to Computer Security

There are some other threats to computer security, such as

1. Spoofing

 It is the technique to access the unauthorised data without concerning to the authorised user.

2. Salami Technique

It diverts small amount of money from a large number accounts maintained by the system.

(3) Hacking

it is an act of intruding into someone else’s computer or network. A hacker is soe who does hacking process.

4. Cracking

It is an act of breaking into comput Creaking tools include password crackers. t virus, war-dialers etc.

5. Phishing

It is characterised by attempting to fraudulently acquire sensitive information such as a passwords, credit cards details etc.

6. Spam

It is the abuse of messaging systems to send unsolicited bulk message in the form of E-mails. IE is also called junk E-mails.

7. Adware

It is any software package which automatically renders advertisements in order to generate revenue for its author.

8. Rootkit

It is a type of malware that is designed to gain administrative level control overa computer system without being detected.

Solutions to Computer Security Threats

Some safeguards to protect a computer system from accidental access are

1. Antivirus Software

It is an application software that is designed to prevent, search for, detect and remove viruses and other malicious softwares. e.g
Avast, McAfee, Quick heal, Avg etc.

2. Digital Certificate

It is the attachment to an electronic message used for security purposes.

3. Digital Signature

It is an electronic form of asignature that can be used to authenticate the identity of the sender of a message.

4. Firewall

Its primary objective is to control the incoming and outgoing network traffic by analysing the data packets and determining
whether it should be allowed through or not,
based on a predetermined rules.

A firewall also includes or works with a proxy
server that makes network requests on behalf of workstation users.

5. Password

It is a secret word or a string of characters used for user authentication to prove identity or access approval to gain access to a resources, which should be kept secret from those who are not allowed to get access.

6. File Access Permission

It refers to privileges that allows a user to read, write or execute a file.

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