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Computer Security Computers Articles | February 8 Alex Maestri Italy Jersey , 2010
In computer world, security is an important aspect to consider when dealing with any computer related task. Here is the basic priciples one must know to understand network secrity.
Generally speaking, Security can be divided into two broad categories: System security and network security. System security means to protect the data residing on your computers from any external threats such as viruses Alex Liddi Italy Jersey , worms, and any hackers. This protection can be done by any anti-virus software or firewalls. This will be of course very important to enterprise servers which store important data for the company.
?On the other hand, network security refers to protecting the data while it is traveling across the line from one computer to another. In this case hackers can easily intercept this data and read it which may contain sensitive information. Hackers can also modify this data before reached to the destination. Of course Alessandro Vaglio Italy Jersey , many possibilities can occur by the hackers while the data is traveling.
?There are three important terms must be known for a good understanding of network security:
?1. Confidentiality: ?This term refers to the privacy of the data being sent. Thus some means must be applied when sending this data. The most common approach is encryption. By this approach, the data is encrypted first before it is sent. Thus, if a hacker intercepts this data he cannot read it.
Encryption is one part of network security and it refers to hiding the sensitive data while traveling on the network. this is done because there are some programs allowed to read this data which may be sensitive to disclose as with credit card numbers and passwords.
There are two major types of algorithms for implementing encryption: symmetric encryption and asymmetric encryption. in symmetric encryption A.J. Morris Italy Jersey , the data are scrambled using one key on the transmitter and then is processed at the receiver using the same key. thus the two keys are the same for the data to be readable.
on the other hand, asymmetric encryption, the another type Italy World Baseball Classic Jerseys , uses two different keys at the transmitter and the receiver to encrypt the data, one is called public key and the other is called private key. the public key must be known to everyone who wants to communicate with the person owning that key but the private key must not be known for the encryption to be successful.
?2. Authentication: Consider some one attempt to access restricted resources such as email account. Not anyone can access your account of course. Only the person having that account can access it. When someone accesses such a resource, he must provide his credentials (username and password) to the server before getting the resource on his computer. This procedure is called authentication. Thus the server must first identify the person before getting him what he need.
?3. Integrity: this term refers to sending the data without any modification. Consider while you are sending your data and someone takes this data before arriving and modify it and then resends it. The solution to attempts this attack is to append some bits along with data which is function of the actual data being sent and may be encrypted also. The receiver then must verify these bits before considering it correct.
?Each of the above techniques is implemented using variety of algorithms. For example an algorithm is called DES is used to encrypt the data before sending it.Fortunately Italy Baseball Jerseys , you don't have to understand each algorithm to understand network security, just take an idea about it along with what it does.
One of the decisions you will face when you purchase a new laptop computer is which case will best suit your needs. While there are many different cases on the market, many of the ones that are carried in the more popular department and office supply stores will not adequately do the job that is necessary to keep your computer safe.
Your choices are a cloth computer case Trey Nielsen World Baseball Classic Jersey , one made of a plastic material, or an aluminum notebook case. There are advantages to all of the options, but with an aluminum case you can avoid many of the disadvantages of the other two.
The Case’s Exterior
Any time you take your computer from your home or office you are putting it at the mercy of all the bumping and banging that it can get out in the world. In this situation aluminum notebook cases stand out above cases made of other materials.
As you look at all of your options you need to look at the durability of the material the case is made from Tommy Layne World Baseball Classic Jersey , and the ability of the case to protect what is inside.
Plastic cases often to crack when they take a hard hit. When that happens the edges around the crack can become sharp and cause damage to people or other objects it comes in contact with. Plastic is then no longer able to keep the moisture away from your computer.
Cloth are prone to tearing, and they do not do a very good job of protecting your computer from taking some licks. They can protect the computer from scratches, but they will not protect it from damage if the case is dropped or hit hard.
The Interior of the Case
The inside of the case case needs to be able to adequately hold the computer in place Tiago da Silva World Baseball Classic Jersey , and to provide enough padding to keep it protected. Cloth cases rarely have more than a thin padding, and possibly a couple of velcro straps to secure the laptop.
However, most of the hard sided laptop cases provide interior padding that is designed to keep the laptop securely in place. If the case is jostled your computer will still be safely in its place. This is crucial because even though the exterior of the case is not damaged Sebastian Poma World Baseball Classic Jersey , the computer in the case is not protected. The components inside the computer are fragile, and they wil. Cheap Jerseys Cheap Jerseys Cheap Jerseys Cheap Sports Jerseys Cheap Jerseys China Free Shipping Cheap NFL Jerseys From China Wholesale Jerseys From China Wholesale Hats Cheap Nike NBA T-shirts Wholesale T-shirts Free Shipping |
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