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 outlines the three core principles for protecting information systems:

🔐 1. Confidentiality

  • Goal: Keep data private and accessible only to authorized users.

  • Example: Encrypting sensitive files, using strong passwords, and setting user access controls.

  • Common Threats: Phishing, unauthorized access, data leaks.

🔧 2. Integrity

  • Goal: Ensure data is accurate, consistent, and not altered by unauthorized parties.

  • Example: Using checksums, digital signatures, and version control to detect and prevent unauthorized changes.

  • Common Threats: Malware, data tampering, insider threats.

📶 3. Availability

  • Goal: Ensure systems and data are accessible to authorized users when needed.

  • Example: Backup systems, redundancy, and protection against Denial-of-Service (DoS) attacks.

  • Common Threats: DDoS attacks, hardware failures, power outages.

Why the CIA Triad Matters:

The CIA Triad provides a framework for designing security policies and systems. Every cybersecurity measure aims to protect one or more of these principles. For example:

  • A firewall helps maintain confidentiality and availability.

  • Hashing algorithms ensure integrity.

  • Disaster recovery plans support availability.

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