Archive for January, 2010
Easy online gaming
January 22nd, 2010 | 
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There are different categories of the games which are categorized on the basis of them being easy or tough. The free gamesand the options to download free games make the entire gaming process much more accessible to people. There are some inbuilt games that are already there on the PC like solitaire and free cell. These games do not really need some extra efforts from the player and are more of mind games.
Any game can be categorized easy or tough depending on the mind of the player. It has been seen that the action games which are mission oriented are not much preferred by girls who opt more for car racing and options like pacman and Mario. These games are also more popular because they are some of the oldest online games and the users can complete them with ease and some practice.
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Computer Network Securities
Computer security policies are the basic guidelines and rules for accessing a network. These lay out some basic concepts to secure
your computers. Computer network security is a complicated area, and is taken up by experts with many years of on-the-job experience.
As more people turn to computers for simplifying their day-to-day activities and jobs, the need for general users to understand the concepts of network security has become important. One should know the risks involved in using the computer without the security systems, and learn how to deal with them successfully both at home and at work.
There are two popular types of network security systems:- transit security and traffic regulation systems. When both of these join forces you can be assured of the delivery of important information to the right person without any network pilferage problems. The receiver should also ensure that the information received should be carefully processed using a computer which is loaded and protected with latest protection software.
The simplest form of ensuring security on the net is to keep a close watch on the type of data packets moving between the networks. If an infected packet does not reach the recipient, the host may have nothing to worry about. Traffic regulation systems serve as a protective screen between the receiver and remote sites. These tools generally guards three basic regions of the network: the routers, firewalls and hosts.
The three ‘guards’ deliver similar service at various points in the network, and it is difficult to draw a differentiating line between them. The truth is that there are no foolproof systems which offer a guaranteed secure system for data transferred in the public network. With the increasing use of the Internet, network security is fast becoming crucial for the safe use of the systems, and therefore computer network security is all set to be an important part of our regular computer usage.
Computer Security Authentication
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 NetworkAaccess 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.
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Computer Fortress – Computer Network Security
Computer security is a very delicate subject because today, the world is being digitalized very rapidly as new technologies are vastly being distributed to the most remote places. Every business involves computers and they need to be safe and secure more than ever, because of the fact that all the important data is being documented and archived on pieces of hardware.
Essentials to shared computers
• For better access, most computers in an organization are linked via a network, which has to be protected by specially designed software. Now, computer security systems are used to protect data from theft, misuse, damage or any other disaster that can potentially harm stored information.
• Computer security is practically not needed if a given computer is not in a network connection or in any other way connected to other computers. Thus, when someone mentions “computer security” – most probably he or she means “computer network security”. For example, there is no chance your computer to become infected, if you don’t have an internet connection.
Privacy issues
One of the most important aspects of computer security is the privacy every person is naturally entitled to. Privacy is absolutely necessary, even if the information available is not sensitive or confidential. Any information, no matter the level of importance, could be used against certain person and may bring damage, and not just emotional. One should always be able to share certain information with certain individuals and predict what harm could be brought if it falls in the wrong hands.
The computer security in its core is a list of usernames and passwords. There are usually one person, the lead manager of the system, who have accedes to all password protected areas, in order to keep everything working and to be able to check for malfunction or any potentials flaws in the system.History shows that it is very often the actual person who breaks down a security system who later helps it to be fixed. After all – he or she is the only one who best knows where the weak parts are and can figure a way to strengthen them. In this business, solutions are carried out by the same persons who have caused or spotted the problems. Some of these people have built the computer security systems that are your best defense against hackers.