Computer Security Concept

Definition:
According to SANS Institute, Network Security is the process of taking physical and software preventative measures to protect the underlying networking infrastructure from unauthorized access, misuse, malfunction, modification, destruction, or improper disclosure, thereby creating a secure platform for computers, users and programs to perform their permitted critical functions within a secure environment.

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Most previous computers and  and its application had no or very less security. At those days, computers were used simply for mathematical evaluation and data processing which were not very important from security point of view. But, when computer application was built to handle business and personal data, the importance of security became important. The concept of security mechanism began to discussed in various events. Two typical examples of such security mechanisms were as follows:

• Provide a user identification and password to every user and use that information to authenticate a user.

• Encode information stored in the databases in some fashion, so that it is not visible to the unauthorized users.

As technology evolved, the communication infrastructure became extremely mature, and newer applications began to be developed for various user demands and needs. Soon, people realized the basic  security measures were not quite enough.

Furthermore, the internet took the world by storm. There were many examples of what could happen if there was insufficient security build in applications developed for the internet.