Three major PRINCIPLES are Confidentiality: Ensuring information can only be seen by certain people and nobody else can see it. Integrity: Data integrity means that the data is safe. No one changes it without permission. The data can only be changed when people upload or store it in a database. Availability: Only authorized users can get information when they need it. Computers, security, and communication must work well for the system's availability. Special systems like medical equipment, power plants, and safety systems have extra rules so they can stay working if something bad happens.