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Home Page > Computers > Security > Computer Security and its role

Computer Security and its role

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Posted: Sep 02, 2009 |Comments: 0

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Computer Security and its role

By: kabaso sydney Mupukwa

About the Author

(ArticlesBase SC #1188264)

Article Source: http://www.articlesbase.com/ – Computer Security and its role

INTRODUCTION

The paper explores the role of Pass word, Anti virus and data  encryption in computer security.  It has been discussed that passwords is known to be ancient. Sentries would challenge those wishing to enter an area or approaching it to supply a password or watchword. Sentries would only allow a person or group to pass if they knew the password. In modern times, user names and passwords are commonly used by people during a log in process that controls access to protected computer operating systems, mobile phones, cable TV decoders, automated teller machines (ATMs), etc. Data encryption refers to mathematical calculations and algorithmic schemes that transform plaintext into cyphertext, a form that is non-readable to unauthorized parties. The recipient of an encrypted message uses a key which triggers the algorithm mechanism to decrypt the data, transforming it to the original plaintext version.

Lastly the paper discusses another important computer security software, computer virus which is a computer program that can copy itself and infect a computer without the permission or knowledge of the owner. The term “virus” is also commonly but erroneously used to refer to other types of malware, adware, and spyware programs that do not have the reproductive ability. A true virus can only spread from one computer to another (in some form of executable code) when its host is taken to the target computer; for instance because a user sent it over a network or the Internet, or carried it on a removable medium such as a floppy disk, CD, DVD, or USB drive.

MAIN BODY

A password is a secret word or string of characters that is used for authentication, to prove identity or gain access to a resource (Example: An access code is a type of password). The password must be kept secret from those not allowed access.

The use of passwords is known to be ancient. Sentries would challenge those wishing to enter an area or approaching it to supply a password or watchword. Sentries would only allow a person or group to pass if they knew the password. In modern times, user names and passwords are commonly used by people during a log in process that controls access to protected computer operating systems, mobile phones, cable TV decoders, automated teller machines (ATMs), etc. A typical computer user may require passwords for many purposes: logging in to computer accounts, retrieving e-mail from servers, accessing programs, databases, networks, web sites, and even reading the morning newspaper online.

Despite the name, there is no need for passwords to be actual words; indeed passwords which are not actual words may be harder to guess, a desirable property. Some passwords are formed from multiple words and may more accurately be called a passphrase. The term passcode is sometimes used when the secret information is purely numeric, such as the personal identification number (PIN) commonly used for ATM access. Passwords are generally short enough to be easily memorized and typed.

For the purposes of more compellingly authenticating the identity of one computing device to another, passwords have significant disadvantages (they may be stolen, spoofed, forgotten, etc.) over authentications systems relying on cryptographic protocols which are more difficult to circumvent. The original password concept has been proven to be insecure. There have been cases where passwords have been compromised without a users knowledge, through coersion, or because they were conned into revealing it. The core problem with legacy passwords is that it is very difficult or impossible for an administrator or a computer system to differentiate between a legitimate user and illegitimate user gaining access through the same password. Because of this inherent flaw in the original password system, Two Factor Authentication was invented.

A password is “something you know.” This information is understood to be known by a single individual. Two-factor authentication systems add in another factor, “something you have”, electronic card key, electronic token, dongle, fob or some other physical item you keep in a secure place when not in use. A common stand in replacement for this second factor when higher levels of security are needed is “something you are”. A biological fingerprint, retina pattern, person’s weight, specific vital signs or a combination of these items is used in place of the electronic device. The biological factor for authentication and authorization has been found to be unreliable, but not in that it permits those that should not be permitted when used properly, but because there is a tendency for it to deny legitimate users access due to sickness, physical body changes, or other physical impairments.

There are two common methods of authentication when users use electronic components for two-factor authentication, response-only, and

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Connection Ambassador:

http://wii.nintendolife.com/news/2009/10/be_a_pal_become_a_connection_ambassador

http://www.nintendo.co.uk/NOE/en_GB/news/2009/nintendo_launches_connection_ambassador_promotion_14834.html

CONNECTING TO WII
Go to “wii”
next page
internet
wireless
find acess point
choose your access point
enter password
test connection
download updates

Connection Ambassador 500 points
Wii shop
bottom left “Connection ambassador Promotion”
Enter the number [2366 3200 6353 9929]
back to wii menu
bottom right button
bottom left the pen and paper button
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post this number on comments
or send via youtube or
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