What is the CIA triad in cyber security?

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Firewalls are like the security guards of a network—they monitor and control incoming and outgoing traffic based on predefined security rules. Their main job is to protect your network from unauthorized access, cyberattacks, and data breaches.

The CIA Triad is a foundational model in cybersecurity that represents three key principles for protecting information:

1. Confidentiality

  • Definition: Ensures that sensitive information is only accessible to authorized users.

  • Goal: Prevent unauthorized access or disclosure of data.

  • Examples:

    • Using encryption to protect data.

    • Implementing user authentication and access controls.

2. Integrity

  • Definition: Ensures that information is accurate and unaltered from its original form.

  • Goal: Prevent unauthorized modification of data.

  • Examples:

    • Checksums and hashing to verify data integrity.

    • Version control and audit trails to track changes.

3. Availability

  • Definition: Ensures that information and systems are accessible to authorized users when needed.

  • Goal: Prevent disruptions to access or service.

  • Examples:

    • Redundancy and failover systems.

    • Protection against DDoS attacks or hardware failures.

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