Zero Trust Security Model - sonuprajapati15/Authentication-Authorization GitHub Wiki
The Zero Trust Security Model (ZTSM) is a security framework that assumes no entityβinside or outside the networkβshould be trusted by default. Every request must be verified, authenticated, and continuously monitored before access is granted.
πΉ Core Principle: "Never Trust, Always Verify."
πΉ Why Zero Trust?
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Prevents insider threats and lateral movement of attackers.
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Protects against data breaches and unauthorized access.
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Enforces least privilege access for users, devices, and applications.
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Identity Verification β Authenticate users with Multi-Factor Authentication (MFA).
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Device Trust β Ensure only secure, compliant devices can access resources.
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Least Privilege Access β Grant access dynamically based on policies.
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Continuous Monitoring β Analyze user behavior and re-evaluate access.
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Micro-Segmentation β Restrict lateral movement between network resources.
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Logging & Auditing β Track all access requests for security analytics.
β‘ Security β Enforce end-to-end encryption, strong authentication, and anomaly detection.
β‘ Scalability β Support large-scale deployments across cloud and on-premise environments.
β‘ Performance β Minimize authentication delays with caching and smart policies.
β‘ Compliance β Ensure GDPR, HIPAA, SOC2 compliance for security and privacy.
β‘ Flexibility β Adapt to hybrid and multi-cloud environments.
- Identity Provider (IdP) β Authenticates users and enforces MFA.
- Policy Decision Point (PDP) β Evaluates access policies dynamically.
- Policy Enforcement Point (PEP) β Intercepts requests and verifies authorization.
- Device Trust Engine β Ensures that only secure devices can access resources.
- Behavioral Analytics β Uses AI/ML to detect anomalous activity.
- Micro-Segmentation Controller β Restricts lateral movement within networks.
- Logging & Security Information and Event Management (SIEM) β Monitors access logs for threats.
- User requests access β Sends request with credentials & device info.
- Identity & Device Verification β MFA + Device Trust Check.
- Policy Evaluation β The system checks role, device, location, risk score.
- Access Decision β If conditions are met, access is granted with least privilege.
- Continuous Monitoring β Behavior is analyzed for suspicious activity.
- Dynamic Enforcement β If risk is detected, access is revoked or re-authenticated.
CREATE TABLE users (
id SERIAL PRIMARY KEY,
username VARCHAR(255) UNIQUE NOT NULL,
password_hash TEXT NOT NULL,
role VARCHAR(50),
mfa_enabled BOOLEAN DEFAULT TRUE
);
CREATE TABLE devices (
id SERIAL PRIMARY KEY,
user_id INT REFERENCES users(id) ON DELETE CASCADE,
device_id VARCHAR(255) UNIQUE NOT NULL,
os VARCHAR(50),
last_seen TIMESTAMP
);
CREATE TABLE access_policies (
id SERIAL PRIMARY KEY,
role VARCHAR(50) NOT NULL,
resource VARCHAR(255) NOT NULL,
condition TEXT NOT NULL
);
CREATE TABLE access_logs (
id SERIAL PRIMARY KEY,
user_id INT REFERENCES users(id),
resource VARCHAR(255),
action VARCHAR(50),
timestamp TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
status VARCHAR(20)
);
Role | Resource | Condition | Rule Explanation |
---|---|---|---|
Admin | /admin-panel | Device is corporate-managed | Only secure devices can access admin panel |
HR | /payroll | Location is corporate network | HR staff can only access payroll from office |
User | /sensitive-doc | MFA is verified | Users need MFA for sensitive files |
Manager | /dashboard | Risk Score < 50 | Managers with normal behavior can access |
View or edit this diagram in Whimsical.
npm install express bcrypt jsonwebtoken dotenv
require("dotenv").config();
const express = require("express");
const bcrypt = require("bcrypt");
const jwt = require("jsonwebtoken");
const app = express();
app.use(express.json());
// Mock Users & Policies
const users = [
{ id: 1, username: "admin", passwordHash: bcrypt.hashSync("password", 10), role: "admin", mfaEnabled: true, deviceTrusted: true }
];
const zeroTrustPolicies = [
{ resource: "/admin-panel", condition: "mfa_verified && device_trusted" },
{ resource: "/sensitive-doc", condition: "mfa_verified" }
];
// Zero Trust Middleware
const authorize = (resource) => (req, res, next) => {
const token = req.headers.authorization?.split(" ")[1];
const user = jwt.verify(token, process.env.JWT_SECRET);
const policy = zeroTrustPolicies.find(p => p.resource === resource);
if (!policy || !(user.mfaVerified && user.deviceTrusted)) {
return res.status(403).json({ message: "Access Denied" });
}
next();
};
// Protected Route
app.get("/admin-panel", authorize("/admin-panel"), (req, res) => res.json({ message: "Admin Panel Access Granted" }));
app.listen(3000, () => console.log("Zero Trust Server running on port 3000"));
Factor | Trade-off |
---|---|
Security | Strongest security model, but requires careful policy management. |
Performance | Continuous verification may slow requests; caching helps. |
Flexibility | Adapts to hybrid environments, but complex to implement. |
Scalability | Works well for enterprises, but requires distributed enforcement points. |
The Zero Trust Security Model provides the highest level of security by ensuring continuous authentication & least privilege access. It is ideal for enterprise, government, and cloud security.