TOTP Reference Implementation (https://tools.ietf.org/id/draft-mraihi-totp-timebased-07.html#Section-Reference-Impl)
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    Verson: 07
    From: 'IETF Trust' (http://trustee.ietf.org/license-info)
    License(s):
        BSD 3-clause (bundled/totp-reference-impl-07/license.txt)