- The principle of confidentiality specifies that only the sender and intended recipient should be able to access the content of a message.
- Confidentiality gets compromised if an unauthorized person is able to access message.
- An example of comprising the confidentiality of message is shown in figure. The user of computer A want to send message to user of computer B. another user C gets access to this message which is not intended to get this message then it defeat purpose of confidentiality.
- If confidential email sent by A to B is accessed by C without permission from A or B then this type of attack is known as interception.