Question

How can I secure sensitive data in transit and at rest?

Answer 1

Use HTTPS (TLS/SSL) for data in transit and encryption for data at rest. In a Node.js app using Express:

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

const options = {
    key: fs.readFileSync('private-key.pem'),
    cert: fs.readFileSync('public-cert.pem')
};

const server = https.createServer(options, app);