Secure by Design Principles

Secure by Design is a foundational principle in software architecture that emphasizes integrating security into the software development lifecycle from the very beginning rather than as an afterthought.

2.1 Least Privilege

Every user and system component should operate using the least amount of privilege necessary.

2.2 Defense in Depth

Implement multiple layers of security controls to protect against different types of threats.

2.3 Fail Securely

In case of failure, the system should fail in a secure manner, preventing unauthorized access.

2.4 Security by Obscurity

Do not rely solely on secrecy for security; instead, implement robust security measures.

2.5 Secure Defaults

All systems should have secure default configurations that minimize vulnerabilities.

• Conduct regular security training for developers.
• Implement code reviews and security audits during the development process.
• Utilize static and dynamic analysis tools to identify vulnerabilities.
• Keep libraries and dependencies up to date.
• Adopt a security-focused design methodology.

4.1 Example of Secure Connection

Ensuring secure connections using HTTPS:

const express = require('express');
const https = require('https');
const fs = require('fs');

const app = express();

const options = {
    key: fs.readFileSync('server.key'),
    cert: fs.readFileSync('server.cert')
};

https.createServer(options, app).listen(443, () => {
    console.log('Secure server running on port 443');
});