Crypto HOME

Welcome to the iwantcoding.com Cryptography Tutorial. Practical cryptography for app developers. Pick safe primitives, use vetted libraries, never hand-roll an algorithm. Almost every CVE in this space is misuse, not breakage.

What this tutorial covers

Who this is for

• Backend devs handling secrets.
• AppSec engineers auditing crypto APIs.
• Anyone shipping passkeys, JWTs, or webhooks.

Example

import { createHash, randomBytes } from 'crypto';
const digest = createHash('sha256').update('hello').digest('hex');
const token  = randomBytes(32).toString('hex');
console.log(digest, token);