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RFC 6287, "OCRA: OATH Challenge-Response Algorithm", June 2011

Source of RFC: IETF - NON WORKING GROUP
Area Assignment: sec

Errata ID: 3729
Status: Verified
Type: Editorial

Reported By: Simon Josefsson
Date Reported: 2013-09-17
Verifier Name: Sean Turner
Date Verified: 2014-01-12

Section 6.3 says:

   The input for timestamps is further qualified by G, size of the time-
   step.  G can be specified in number of seconds, minutes, or hours:

           +--------------------+------------------------------+
           | Time-Step Size (G) |           Examples           |
           +--------------------+------------------------------+
           |       [1-59]S      | number of seconds, e.g., 20S |
           |       [1-59]M      |  number of minutes, e.g., 5M |
           |       [0-48]H      |  number of hours, e.g., 24H  |
           +--------------------+------------------------------+

                       Table 3: Time-step Size Table

   Default value for G is 1M, i.e., time-step size is one minute and the
   T represents the number of minutes since epoch time [UT].

It should say:

   The input for timestamps is further qualified by G, size of the time-
   step.  G can be specified in number of seconds, minutes, or hours:

           +--------------------+------------------------------+
           | Time-Step Size (G) |           Examples           |
           +--------------------+------------------------------+
           |       [1-59]S      | number of seconds, e.g., 20S |
           |       [1-59]M      |  number of minutes, e.g., 5M |
           |       [1-48]H      |  number of hours, e.g., 24H  |
           +--------------------+------------------------------+

                       Table 3: Time-step Size Table

   Default value for G is 1M, i.e., time-step size is one minute and the
   T represents the number of minutes since epoch time [UT].

Notes:

I have changed "[0-48]H" to "[1-48]H".

According to section 5.1, T is "representing the number of time-steps (seconds, minutes, hours, or days depending on the specified granularity) since midnight UTC of January 1, 1970 [UT]."

Having a granualarity of 0 is non-sense, and likely an editorial error.

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