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Re: How safe are signed git tags? Only as safe as SHA-1 or somehow safer?

From
Jeff King <peff@peff.net>
Date
Nov 25, 2014, 03:47 UTC
Message-ID
<20141125034730.GB19161@peff.net>
In-Reply-To
<CACsJy8C3Bfruy=usn9MajmLP_10s2zf8AFZJmxyeGSPDS9SwVQ@mail.gmail.com>
On Tue, Nov 25, 2014 at 08:52:58AM +0700, Duy Nguyen wrote:
Show 6 quoted lines
> On Tue, Nov 25, 2014 at 8:23 AM, Jonathan Nieder <jrnieder@gmail.com> wrote:
> > I think the biggest obstacle is the upgrade path. ;-)
> 
> In the worst case we can always treat new repos as a different VCS. So
> people will need a migration from SHA-1 to the new format, just like
> they migrate from SVN/CVS to Git. Painful but simple.
Maybe we can fix the tree-sorting order while we are at it. :)

More seriously, there may come a day when we are ready to break compatibility completely with a new "Git v3.0" (2.0 is already taken, of course). I do not have immediate plans for it, but it's possible that multiple factors may make such a move desirable sometime in the next 10 years, and that would be a good time to jump hash algorithms, as well.

So it's possible that procrastinating on SHA-1 issues may be the least painful route. Or it may just be pushing off the day of pain. :)

-Peff
Previous: Stefan BellerNext: Duy Nguyen
Message 18 of 21 in “How safe are signed git tags? Only as safe as SHA-1 or somehow safer?”
  1. Patrick SchleizerNov 16, 2014
  2. Jeff KingNov 17, 2014
  3. Patrick SchleizerNov 21, 2014
  4. Jason PyeronNov 21, 2014
  5. Jeff KingNov 22, 2014
  6. Jeff KingNov 22, 2014
  7. Fedor BrunnerNov 25, 2014
  8. Duy NguyenNov 24, 2014
  9. Michael J GruberNov 24, 2014
  10. Duy NguyenNov 24, 2014
  11. Duy NguyenNov 25, 2014
  12. Jeff KingNov 24, 2014
  13. Nico WilliamsNov 24, 2014
  14. Duy NguyenNov 25, 2014
  15. Jonathan NiederNov 25, 2014
  16. Duy NguyenNov 25, 2014
  17. Stefan BellerNov 25, 2014
  18. Jeff KingNov 25, 2014
  19. Duy NguyenNov 25, 2014
  20. Junio C HamanoNov 25, 2014
  21. brian m. carlsonNov 25, 2014

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