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Computer Security Authentication
Image via Wikipedia Computer security authentication means verifying the identity of a user logging onto a network. Passwords, digital certificates, smart cards and biometrics can be used to prove the identity of the user to the network. Computer security authentication includes verifying message integrity, e-mail authentication and MAC (Message Authentication Code), checking the integrity of a transmitted message. There are human authentication, challenge-response authentication, password, digital signature, IP spoofing and biometrics.
Human authentication is the verification that a person initiated the transaction, not the computer. Challenge-response authentication is an authentication method used to prove the identity of a user logging onto the network. When a user logs on, the network access server (NAS), wireless access point or authentication server creates a challenge, typically a random number sent to the client machine. The client software uses its password to encrypt the challenge through an encryption algorithm or a one-way hash function and sends the result back to the network. This is the response.
Two- factor authentication requires two independent ways to establish identity and privileges. The method of using more than one factor of authentication is also called strong authentication. This contrasts with traditional password authentication, requiring only one factor in order to gain access to a system. Password is a secret word or code used to serve as a security measure against unauthorized access to data. It is normally managed by the operating system or DBMS. However, a computer can only verify the legality of the password, not the legality of the user.
The two major applications of digital signatures are for setting up a secure connection to a website and verifying the integrity of files transmitted. IP spoofing refers to inserting the IP address of an authorized user into the transmission of an unauthorized user in order to gain illegal access to a computer system.
Biometrics is a more secure form of authentication than typing passwords or even using smart cards that can be stolen. However, some ways have relatively high failure rates. For example, fingerprints can be captured from a water glass and fool scanners.
Human authentication is the verification that a person initiated the transaction, not the computer. Challenge-response authentication is an authentication method used to prove the identity of a user logging onto the network. When a user logs on, the network access server (NAS), wireless access point or authentication server creates a challenge, typically a random number sent to the client machine. The client software uses its password to encrypt the challenge through an encryption algorithm or a one-way hash function and sends the result back to the network. This is the response.
Two- factor authentication requires two independent ways to establish identity and privileges. The method of using more than one factor of authentication is also called strong authentication. This contrasts with traditional password authentication, requiring only one factor in order to gain access to a system. Password is a secret word or code used to serve as a security measure against unauthorized access to data. It is normally managed by the operating system or DBMS. However, a computer can only verify the legality of the password, not the legality of the user.
The two major applications of digital signatures are for setting up a secure connection to a website and verifying the integrity of files transmitted. IP spoofing refers to inserting the IP address of an authorized user into the transmission of an unauthorized user in order to gain illegal access to a computer system.
Biometrics is a more secure form of authentication than typing passwords or even using smart cards that can be stolen. However, some ways have relatively high failure rates. For example, fingerprints can be captured from a water glass and fool scanners.
Computer Security provides detailed information on Computer Security, Computer Security Systems, Computer Network Securities, Computer Security Software and more. Computer Security is affiliated with Information Security Systems [http://www.e-InformationSecurity.com].
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Cyber Security - 4 Things to Do to Improve Computer Cyber Security and Prevent Cyber Crime Attacks
Image via Wikipedia In this article, you will learn to avoid all the silly mistakes most computer owners make and expose their computers and personal information open to cyber attacks. You'll also discover why is it important to change your passwords frequently and have up-to-date firewall and antivirus program.
Emails- the best and most simple rule to protect your computer from email cyber attacks is: if you don't know the sender, be very careful and never open any file attached to it. Sometimes even your friends may send you phishing emails against unwittingly because their computer has been attacked and the email is forwarded to you without their approval.
Very simple but effective protection is "When in Doubt- Delete". Your friend will understand.
Common signs include phishing hyperlinks and messages that urge you to open the attached file.
Passwords- passwords are just like door key and they are used to protect our virtual belongings stored on our computer. They should be very difficult to duplicate or steal by cyber criminals, just like door key that we always store in secure location.
Very important and effective rule to keep our passwords safe is: Never share your password with anyone, use different passwords for different for different places and constantly change your passwords.
Here are some proven effective rules to make passwords:
1. Passwords should not make much logical sense and have minimum of 8 characters- this will make it hard to guess.
2. Use types of characters allowed- lower case, upper case, numbers, symbols, special, etc.
3. Change your passwords frequently, the more frequent the better.
4. Under no circumstance give out your password to anybody.
In addition to the above cyber attack prevention tasks, for full computer protection it is very important to have good Firewall and maintain up-to-date antivirus program.
Firewalls- they protect your computer form the outside cyber world by filtering potentially dangerous data to enter your computer. They stop unauthorised data, usually form internet or emails, while data from trusted sources is allowed in.
Up-to-date antivirus software- good antivirus software is "must have" for all computers. Antivirus software is like immunization to humans, it prevents malicious software of entering and potentially damaging your computer.
These programs have been created and designed to protect your computer against known viruses. Therefore, it is critical to keep your antivirus program up-to-date to protect your computer form newly created cyber attacks.
Emails- the best and most simple rule to protect your computer from email cyber attacks is: if you don't know the sender, be very careful and never open any file attached to it. Sometimes even your friends may send you phishing emails against unwittingly because their computer has been attacked and the email is forwarded to you without their approval.
Very simple but effective protection is "When in Doubt- Delete". Your friend will understand.
Common signs include phishing hyperlinks and messages that urge you to open the attached file.
Passwords- passwords are just like door key and they are used to protect our virtual belongings stored on our computer. They should be very difficult to duplicate or steal by cyber criminals, just like door key that we always store in secure location.
Very important and effective rule to keep our passwords safe is: Never share your password with anyone, use different passwords for different for different places and constantly change your passwords.
Here are some proven effective rules to make passwords:
1. Passwords should not make much logical sense and have minimum of 8 characters- this will make it hard to guess.
2. Use types of characters allowed- lower case, upper case, numbers, symbols, special, etc.
3. Change your passwords frequently, the more frequent the better.
4. Under no circumstance give out your password to anybody.
In addition to the above cyber attack prevention tasks, for full computer protection it is very important to have good Firewall and maintain up-to-date antivirus program.
Firewalls- they protect your computer form the outside cyber world by filtering potentially dangerous data to enter your computer. They stop unauthorised data, usually form internet or emails, while data from trusted sources is allowed in.
Up-to-date antivirus software- good antivirus software is "must have" for all computers. Antivirus software is like immunization to humans, it prevents malicious software of entering and potentially damaging your computer.
These programs have been created and designed to protect your computer against known viruses. Therefore, it is critical to keep your antivirus program up-to-date to protect your computer form newly created cyber attacks.
If you would like a FREE SCAN of your PC, visit this Best Antivirus Program review site, it has review of the best performing software including free downloads.
To learn more on how to speed up your computer download the free e-book "Step-by-Step- Turtle to Rabbit Performing Computer" Click Here! You will learn exactly how I improved my computer performance and saved $$$$.
Wish you all the best.
To learn more on how to speed up your computer download the free e-book "Step-by-Step- Turtle to Rabbit Performing Computer" Click Here! You will learn exactly how I improved my computer performance and saved $$$$.
Wish you all the best.
Article Source: http://EzineArticles.com/?expert=Violeta_Ristevska
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Computer Program Security
Not everyone wants or needs to run a full blown internet security suite. As a bare minimum, however, you should be running an antivirus software
Every computer with access to the internet is vulnerable to attack by cyber-criminals. These intruders are interested in what you have stored on your computer like credit card numbers, bank account details, passwords and so on. By stealing this information they can either use this information themselves or sell it to other criminals.
This is only one part of the picture. The other being that some of these attackers are just interested in using your PC as a means to attack other computers. This way if an attack gets traced, your computer will be the culprit. A lot of spammers work this way.
With the majority of home users using always on, fast cable or DSL connections attacks have been on the increase. It is much easier for a cyber-criminal to target a home user than a corporate network. Corporate networks are usually highly secured while the average home user is not.
Computer program security should be a priority to all of us surfing the internet. A lot of people neglect to pay attention to their computer's security while online. This not only puts themselves but also other people in danger. And the results may come to haunt you.
Maybe you clicked on an email attachment or a link in a webpage containing malicious code. Once you are infected, the spyware program might start to download extra malware to take over your computer. If you are lucky you will see the signs of an infection. The malware will often advertise itself by incessant pop-ups, changing your desktop wallpaper or urging you to download an antivirus program to disinfect your PC.
These are the most common type of infections which are easily detected. You could try to cleanup your PC by scanning it with the appropriate antivirus or antispyware software. If you want to be a 100% sure you got rid of these malicious programs you better format your harddisk and reinstall the operating system.
The most dangerous spyware however is the kind that doesn't announce its presence and quietly sits in the background preying on any information it can capture. It is therefore advisable to scan your PC regularly, but this is a routine most home users do not apply.
You would ideally have a program in place that protects your data, even when you are infected.
Every computer with access to the internet is vulnerable to attack by cyber-criminals. These intruders are interested in what you have stored on your computer like credit card numbers, bank account details, passwords and so on. By stealing this information they can either use this information themselves or sell it to other criminals.
This is only one part of the picture. The other being that some of these attackers are just interested in using your PC as a means to attack other computers. This way if an attack gets traced, your computer will be the culprit. A lot of spammers work this way.
With the majority of home users using always on, fast cable or DSL connections attacks have been on the increase. It is much easier for a cyber-criminal to target a home user than a corporate network. Corporate networks are usually highly secured while the average home user is not.
Computer program security should be a priority to all of us surfing the internet. A lot of people neglect to pay attention to their computer's security while online. This not only puts themselves but also other people in danger. And the results may come to haunt you.
Maybe you clicked on an email attachment or a link in a webpage containing malicious code. Once you are infected, the spyware program might start to download extra malware to take over your computer. If you are lucky you will see the signs of an infection. The malware will often advertise itself by incessant pop-ups, changing your desktop wallpaper or urging you to download an antivirus program to disinfect your PC.
These are the most common type of infections which are easily detected. You could try to cleanup your PC by scanning it with the appropriate antivirus or antispyware software. If you want to be a 100% sure you got rid of these malicious programs you better format your harddisk and reinstall the operating system.
The most dangerous spyware however is the kind that doesn't announce its presence and quietly sits in the background preying on any information it can capture. It is therefore advisable to scan your PC regularly, but this is a routine most home users do not apply.
You would ideally have a program in place that protects your data, even when you are infected.
Fortunately, these kind of programs do exist. Have a look at http://pcuserinfo.com/reviews/sentrybay-personal-data-protection/ to take your computer program security into you own hands.
Article Source: http://EzineArticles.com/?expert=Peter_D.
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