- Encoding
How to verify webhook signatures: Stripe, GitHub, Slack
Every major webhook provider signs their requests with HMAC. Here's the working verification code for each, the timing-attack pitfall everyone hits, and a universal template.
Read - Developer
Why your regex is slow: catastrophic backtracking explained
The reason `(a+)+b` hangs on `aaaaaaaaac` — and the five patterns that turn a 10ms validator into a 30-second ReDoS attack.
Read - Encoding
How to generate a strong password (and what entropy means)
Length beats complexity. Here's the math, the actual number of bits you need, and why `correct horse battery staple` is stronger than `P@ssw0rd!`.
Read - Encoding
What is HMAC (and why SHA-256 alone isn't enough)?
HMAC is how you prove a message wasn't tampered with. It's SHA-256 plus a clever wrapping you should never try to reinvent.
Read - Developer
What is a JWT? A practical guide for developers in 2026
JSON Web Tokens explained simply: what they are, how they work, when to use them — and how to inspect one safely.
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