10-15-2025, 02:56 AM
HOTP shines for intermittent use because codes don’t expire by clock—they’re event-driven. The trade-off is managing counter state. Use a modest resync window (say 10–20 steps for field scenarios), enforce throttling, and bump the server counter only on a verified hit inside that window. Provide a “resync” flow in support tools to test a few successive codes and catch up safely. When evaluating or demoing sequence behavior without affecting your live systems, this hotp generator enables you to generate the exact next codes and verify your backend logic. If your users authenticate constantly, TOTP can be simpler; for bursty, offline-friendly workflows, HOTP with sane windows is very practical.