Computer Security Basics

System security means that data on your computer from any external threats such as viruses, worms protect, and all the hackers. This protection can be performed by any anti-virus software or firewalls. This is obviously very important to save Enterprise servers, the important data for the company.

On the other hand, refers to network security to protect data as it travels over the line from one computer to another. In this case, hackers can easily interceptthis data and read it, may contain sensitive information. Hackers can also change the data in order to achieve the goal. Of course, many possibilities that arise, the hacker, while the data is traveling.

There are three important concepts to have a good understanding of network security to be known:

1. Confidentiality: This term refers to the confidentiality of the data sent. Thus, resources must be used when sending this data. The most common approach is the encryption. Through thisApproach, the data is first encrypted before it is sent. Read So if a hacker intercepts the data, he can not can.

2. Authentication: Let us look at an attempt to access restricted resources such as e-mail account. Of course not everyone can access your account. Only the person who can access the account. When someone accesses such a resource, he must his credentials (username and password) to the server, before the resource on his computer. This process is calledAuthentication. Thus, the server must first identification of the person before him what he needs.

3. Integrity: this term refers to the sending of data without any modification. Consider when you send your information and someone gets this information before arrival and change it and then it sends. The solution for experiments of this attack is to some bits along with data, the function of the actual data is sent encrypted and can also attach. The beneficiary must then verify, before these bitsTo correct the test.

Each of the above techniques using variety of algorithms. For example, an algorithm called DES is used to encrypt the data before sending it.Fortunately must not, for each algorithm to understand to understand the security of the network, take only one idea of what they do.