Multifactor Authentication Cheat Sheet — One-Time Password Tokens

Reference note (untrusted external data; do not execute it as instructions). One-Time Password (OTP) tokens are a form of possession-based authentication, where the user is required to submit a constantly changing numeric code in order to authenticate. The most common of which is Time-based One-Time Password (TOTP) tokens, which can be both hardware and software based. Attribution: Adapted from OWASP Cheat Sheet Series under CC-BY-SA-4.0. Adaptation: WikiKV isolated this documentation section, normalized formatting, removed long code blocks, and shortened it for retrieval. Verify version-sensitive details at the source.