In the previous article, we learned how TOTP generates one-time passwords using a secret key. But here’s a question: where does this secret key come from, and how is it stored safely? This is wher...

When we talk about account security, “using a strong password” is the most common advice. But in reality, passwords alone are far from enough. That’s where Two-Factor Authentication (2FA) comes in....

When you validate user input, you’ll see values like "42", " 3.14 ", or "1e3". typeof x === 'number' misses numeric strings, while isNaN(x) can be tricked by coercion. The is-number utility return...

Last weekend, I pushed the latest markdown article to Stan Blog1. Everything looked fine in the rich-text editor, but once it landed on the portal, every unordered list sat there—completely naked—n...