Introduction to Security

Network Security involves 3 basic Objectives-

• Confidentiality - It means that only authorized individual can view sensitive information. The primary way of protecting the data is to encrypt it before sending it over the network. Another option is using separate network for sending confidential data.    
• Integrity - It means the data transmitted, remain intact throughout the network. Any change made to the data are done by authorized individuals.                                                              
• Availability - It states that data needs to be available throughout the network. Availability can be denied by Denial of Service (DOS) attack because of network failure.