On Wed 2015-02-11T15:05:26 +0100, Steffen Nurpmeso hath writ: > "Steve Allen" <[email protected]> wrote: > |The IERS Paris bureau is also providing such a file. That makes at > |least three separate sources for this information. Each source has a > |different timestamp, a different expiration date, and different > |commentary text.
> The complete list of leap seconds only needs to be updated after > a leap second occurred. Yes, so long as NTP and things with related needs have relable access to the next leap second. > The "security" of fetching PHK's bulletin-c is > already "better" than the FTP based links above, since those offer > no security at all, for more data. The IERS Paris version of leap-seconds.list is actually available via HTTPS, so there is that much security, but only for the direct recipient. I would much prefer something with a digital signature that could be syndicated to many servers and still contain evidence of its authenticity. I think syndication is especially important for IERS Paris because I fear their server CPU and network bandwidth cannot support huge client loads (although that is probably true of NIST and USNO as well). That is why I have refrained from publishing its location. I am not convinced that any of the agencies who are providing leap-seconds.list are in a position to publish an authenticated public key that could be used to verify the authenticity of a file like this. So I would like to see a format which can contain a digital signature and which can be syndicated almost as broadly as DNS. -- Steve Allen <[email protected]> WGS-84 (GPS) UCO/Lick Observatory--ISB Natural Sciences II, Room 165 Lat +36.99855 1156 High Street Voice: +1 831 459 3046 Lng -122.06015 Santa Cruz, CA 95064 http://www.ucolick.org/~sla/ Hgt +250 m _______________________________________________ LEAPSECS mailing list [email protected] https://pairlist6.pair.net/mailman/listinfo/leapsecs
