CIA Triad
Confidentiality — this focuses on protecting the “Read” operation. You do not want unauthorized people to read your confidential information, for example, your credit card number, your passwords, or payroll amount.
Integrity — this focuses on protecting the “Write” operation. You do not want unauthorized people to modify your data. For example, you do not want someone to withdraw money from your bank account without your permission.
Availability — this means the systems and data are always accessible when you need them. For example, an online banking system or an online shopping site should always be on.
