Zero Trust Architecture

# ZTA: Comprehensive Security Framework

## 1. Core Principles
- **Never Trust, Always Verify:** Assume breach at all times. Every request must be authenticated, authorized, and encrypted.
- **Least Privilege Access:** Users are granted minimum access necessary to perform specific functions.
- **Assume Breach:** Design networks as if attackers are already present inside the perimeter.

## 2. Technical Components
- **PDP (Policy Decision Point):** The brain of ZTA; evaluates access requests against security policies.
- **PEP (Policy Enforcement Point):** The execution layer; sits between the user and the resource to block or allow traffic.
- **IAM Integration:** Centralized identity verification, strictly enforcing MFA and device health posture.

## 3. Implementation Strategies
- **Micro-segmentation:** Dividing the network into small, isolated zones to prevent lateral movement of threats.
- **Continuous Monitoring:** Real-time analysis of traffic patterns and user behavior (UEBA).
- **Device Trust:** Validating the security posture of endpoints before granting application access.

## 4. Architectural Challenges
- Legacy system incompatibility.
- Complexity in policy management.
- Latency introduced by constant validation.

## 5. Strategic Roadmap
1. Define the 'Protect Surface' (Data, Applications, Assets, Services).
2. Map transaction flows.
3. Architect the ZTA environment.
4. Create ZTA policies.
5. Monitor and maintain.