ConceptHMAC-based One-Time Password
HOTP
A counter-based one-time password algorithm defined by RFC 4226. Alongside TOTP, it uses an incrementing counter rather than a timestamp as input.
Timeline (last 90 days)
Oct 13
HOTP is a counter-based rather than time-based algorithm defined by RFC 4226.
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Sep 10
TOTP is an evolution of HOTP (HMAC-Based One-Time Password, RFC 4226); HOTP uses an incrementing event counter, and TOTP replaces it with the current timestamp.
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