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Cybersecurity guides

Step-by-step how-tos, head-to-head comparisons and honest roundups — every guide worked through with current figures, then backed by a RECATOOLS calculator or AI-directory entry so you can act on it.

498 guides published 17 topic areas Latest guide Oct 2026

Tagged Developer · 3 guides

All 498 Developer Tools 68 AI & ML 63 Finance 52 Home & Living 46 Chinese Culture 43 Cybersecurity 30

Coloured source code on a dark editor screen, photographed at an angle

Cybersecurity 5 min

Sixteen different base64 strings decode to the same byte

Base64 leaves four bits free when it encodes a single byte, and RFC 4648 binds encoders with MUST while granting decoder...

Kenji Tanaka

Pub. 12 Sep

A close-up of a laptop keyboard and trackpad with a small fingerprint reader beside it

Cybersecurity 6 min

WebAuthn tells your server to ignore the bit that proves two factors

One flag distinguishes a passkey login that used only the device from one that also took a PIN or fingerprint. The spec...

Kenji Tanaka

Pub. 11 Sep

Cybersecurity 22 min

Which Hash for What: MD5, SHA-256, and the Password Mistake

"MD5 is broken, so hash your passwords with SHA-256 instead" gets both halves wrong, in opposite directions. What broke...

Cyber Team

Pub. 25 Jul