HOTP Reference
HMAC-based one-time passwords.
Commands
| Command | Description |
|---|---|
intro |
Algorithm, HOTP vs TOTP |
implement |
Python/Node.js code |
security |
Counter sync, resync |
HOTP (RFC 4226) HMAC-based one-time password reference. Counter- based OTP for hardware tokens. Covers algorithm step-by-step, Python implementation from scratch, pyotp/otpauth libraries, counter synchronization, resync protocol, look-ahead window, and security considerations vs TOTP.
npx skillmds@latest add bytesagain/hotp HMAC-based one-time passwords.
| Command | Description |
|---|---|
intro |
Algorithm, HOTP vs TOTP |
implement |
Python/Node.js code |
security |
Counter sync, resync |
bytesagain/ai-skills/tree/main/hotp commit e640c1cf08