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Question:
TOTP, or time-based one-time password, algorithms depend on the time being accurate between both of the authentication hosts. That means if a system or device is not properly synced to an authoritative and correct time server, or if its local system time has drifted, the authentication may fail. Although TOTP systems have some flexibility, a clock that is sufficiently incorrect would cause an issue. HMAC-based one-time password (HOTP) and short message service (SMS)-based multi-factor systems do not suffer from this issue, and MMAC was made up for this question.
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