What is zero trust security architecture?

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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.

Zero Trust Security Architecture is a cybersecurity approach built on the principle “never trust, always verify.”

Instead of assuming that anything inside a network is safe, Zero Trust treats every user, device, and request as potentially untrusted—whether it comes from inside or outside the organization.

Key Principles of Zero Trust:

1. Verify Every Request
   Every access request must be authenticated, authorized, and encrypted—no matter where it originates.

2. Least Privilege Access
   Users and devices get the minimum level of access they need to perform their tasks, reducing the potential damage from breaches.

3. Continuous Monitoring
   Security checks don’t stop after login—user behavior, device health, and network activity are constantly monitored for suspicious activity.

4. Micro-Segmentation
   The network is divided into smaller segments so if one is compromised, attackers can’t freely roam through the entire system.

5. Assume Breach
   Zero Trust works with the mindset that breaches can happen anytime, so systems are designed to contain and limit damage quickly.

Example:
In a traditional model, once you’re inside the corporate network, you can access most resources. In Zero Trust, even if you’re inside, you still have to prove your identity and authorization for each action—like a bouncer checking your ID at every door in a club.

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