RFC Errata
RFC 6287, "OCRA: OATH Challenge-Response Algorithm", June 2011
Source of RFC: IETF - NON WORKING GROUPArea Assignment: sec
See Also: RFC 6287 w/ inline errata
Errata ID: 3729
Status: Verified
Type: Editorial
Publication Format(s) : TEXT
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.