TOTP：Time-based One-time Password Algorithm（基於時間的一次性密碼算法）

TOTP - Time-based One-time Password Algorithm is an extension of the HMAC-based One Time Password algorithm HOTP to support a time based moving factor. TOTP（基於時間的一次性密碼算法）是支持時間作爲動態因素基於HMAC一次性密碼算法的擴展。 維

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