The need for automated tools for protecting the files and other information stored on the computer became evident. This is especially the case for a shared system as like the internet. Thus, computer security is the generic name for the collection of tools designed to protect data and to prevent hackers.
The network security is needed to protect data during the transmission of the data over the network. While using it network to transmit the data it must secure the confidential data.
Internet security is needed to protect data during their transmission a collection of interconnected networks. Internet security consists of measures to deter, prevent detect and correct security violations that involve the transmission and storage of information.