[ntp:hackers] Time over HTTPS Specification

Poul-Henning Kamp phk at phk.freebsd.dk
Sun Nov 29 22:44:17 UTC 2015

I have researched the "time over HTTPS" idea more, and nailed
down some of the details.

I have also added a HTTP header the server can send to improve
things to (almost) no end.

I have written the result up as a specification here:


Inputs, commentary, corrections etc are most welcome.

Ideally this spec should be pushed through IETF, but lets give
it a dry cleaning here first.


PS: I will release my client reference implementation shortly,
    when I have had a chance to tidy it up and check it for any
    obvious portability issues.

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.

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