From: Junio C Hamano <gitster@pobox.com>
To: Stefan Beller <sbeller@google.com>
Cc: David Lang <david@lang.hm>,
Ian Jackson <ijackson@chiark.greenend.org.uk>,
Joey Hess <id@joeyh.name>,
"git\@vger.kernel.org" <git@vger.kernel.org>
Subject: Re: SHA1 collisions found
Date: Fri, 24 Feb 2017 12:05:52 -0800 [thread overview]
Message-ID: <xmqqpoi71hi7.fsf@gitster.mtv.corp.google.com> (raw)
In-Reply-To: <xmqq7f4f4cqg.fsf@gitster.mtv.corp.google.com> (Junio C. Hamano's message of "Fri, 24 Feb 2017 11:20:39 -0800")
Junio C Hamano <gitster@pobox.com> writes:
> The not-so-well-hidden agenda was exactly that we _SHOULD_ not
> mimick PGP. They do not have a requirement to encourage everybody
> to use the same thing because each message is encrypted/signed
> independently, i.e. they do not have to chain things like we do.
To put it less succinctly, PGP does not have incentive to encourage
everybody to converge to the same. They can afford to say "You can
use whatever you among your circles agree to use and the rest of the
world won't care". If two groups that have used different ones later
meet, both of them can switch to a common one from that point forward,
but their past exchanges won't affect the future.
You cannot say the same thing for Git. Once you decide to merge two
histories from two camps, which may have originated from the same
codebase but then decided to use two different ones while they were
forked, you'd be forced to support all three forever. We have a lot
stronger incentive to discourage fragmentation.
next prev parent reply other threads:[~2017-02-24 20:06 UTC|newest]
Thread overview: 136+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-23 16:43 SHA1 collisions found Joey Hess
2017-02-23 17:00 ` David Lang
2017-02-23 17:02 ` Junio C Hamano
2017-02-23 17:12 ` David Lang
2017-02-23 20:49 ` Jakub Narębski
2017-02-23 20:57 ` Jeff King
2017-02-23 17:18 ` Junio C Hamano
2017-02-23 17:35 ` Joey Hess
2017-02-23 17:52 ` Linus Torvalds
2017-02-23 18:21 ` Joey Hess
2017-02-23 18:31 ` Joey Hess
2017-02-23 19:13 ` Morten Welinder
2017-02-24 15:52 ` Geert Uytterhoeven
2017-02-23 18:40 ` Linus Torvalds
2017-02-23 18:46 ` Jeff King
2017-02-23 19:09 ` Linus Torvalds
2017-02-23 19:32 ` Jeff King
2017-02-23 19:47 ` Linus Torvalds
2017-02-23 19:57 ` Jeff King
[not found] ` <alpine.LFD.2.20.1702231428540.30435@i7.lan>
2017-02-23 22:43 ` Jeff King
2017-02-23 22:50 ` Linus Torvalds
2017-02-23 23:05 ` Jeff King
2017-02-23 23:05 ` [PATCH 1/3] add collision-detecting sha1 implementation Jeff King
2017-02-23 23:15 ` Stefan Beller
2017-02-24 0:01 ` Jeff King
2017-02-24 0:12 ` Linus Torvalds
2017-02-24 0:16 ` Jeff King
2017-02-23 23:05 ` [PATCH 2/3] sha1dc: adjust header includes for git Jeff King
2017-02-23 23:06 ` [PATCH 3/3] Makefile: add USE_SHA1DC knob Jeff King
2017-02-24 18:36 ` HW42
2017-02-24 18:57 ` Jeff King
2017-02-23 23:14 ` SHA1 collisions found Linus Torvalds
2017-02-28 18:41 ` Junio C Hamano
2017-02-28 19:07 ` Junio C Hamano
2017-02-28 19:20 ` Jeff King
2017-03-01 8:57 ` Dan Shumow
2017-02-28 19:34 ` Linus Torvalds
2017-02-28 19:52 ` Shawn Pearce
2017-02-28 22:56 ` Linus Torvalds
2017-02-28 21:22 ` Dan Shumow
2017-02-28 22:50 ` Marc Stevens
2017-02-28 23:11 ` Linus Torvalds
2017-03-01 19:05 ` Jeff King
2017-02-23 20:47 ` Øyvind A. Holm
2017-02-23 20:46 ` Joey Hess
2017-02-23 18:42 ` Jeff King
2017-02-23 17:52 ` David Lang
2017-02-23 19:20 ` David Lang
2017-02-23 17:19 ` Linus Torvalds
2017-02-23 17:29 ` Linus Torvalds
2017-02-23 18:10 ` Joey Hess
2017-02-23 18:29 ` Linus Torvalds
2017-02-23 18:38 ` Junio C Hamano
2017-02-24 9:42 ` Duy Nguyen
2017-02-25 19:04 ` brian m. carlson
2017-02-27 13:29 ` René Scharfe
2017-02-28 13:25 ` brian m. carlson
2017-02-24 15:13 ` Ian Jackson
2017-02-24 17:04 ` ankostis
2017-02-24 17:23 ` Jason Cooper
2017-02-25 23:22 ` ankostis
2017-02-24 17:32 ` Junio C Hamano
2017-02-24 17:45 ` David Lang
2017-02-24 18:14 ` Junio C Hamano
2017-02-24 18:58 ` Stefan Beller
2017-02-24 19:20 ` Junio C Hamano
2017-02-24 20:05 ` ankostis
2017-02-24 20:32 ` Junio C Hamano
2017-02-25 0:31 ` ankostis
2017-02-26 0:16 ` Jason Cooper
2017-02-26 17:38 ` brian m. carlson
2017-02-26 19:11 ` Linus Torvalds
2017-02-26 21:38 ` Ævar Arnfjörð Bjarmason
2017-02-26 21:52 ` Jeff King
2017-02-27 13:00 ` Transition plan for git to move to a new hash function Ian Jackson
2017-02-27 14:37 ` Why BLAKE2? Markus Trippelsdorf
2017-02-27 15:42 ` Ian Jackson
2017-02-27 19:26 ` Transition plan for git to move to a new hash function Tony Finch
2017-02-28 21:47 ` brian m. carlson
2017-03-02 18:13 ` Ian Jackson
2017-03-04 22:49 ` brian m. carlson
2017-03-05 13:45 ` Ian Jackson
2017-03-05 23:45 ` brian m. carlson
2017-02-24 20:05 ` Junio C Hamano [this message]
2017-02-24 20:33 ` SHA1 collisions found Philip Oakley
2017-02-24 23:39 ` Jeff King
2017-02-25 0:39 ` Linus Torvalds
2017-02-25 0:54 ` Linus Torvalds
2017-02-25 1:16 ` Jeff King
2017-02-26 18:55 ` Junio C Hamano
2017-02-25 6:10 ` Junio C Hamano
2017-02-26 1:13 ` Jason Cooper
2017-02-26 5:18 ` Jeff King
2017-02-26 18:30 ` brian m. carlson
2017-03-02 21:46 ` Brandon Williams
2017-03-03 11:13 ` Jeff King
2017-03-03 14:54 ` Ian Jackson
2017-03-03 22:18 ` Jeff King
2017-03-02 19:55 ` Linus Torvalds
2017-03-02 20:43 ` Junio C Hamano
2017-03-02 21:21 ` Linus Torvalds
2017-03-02 21:54 ` Joey Hess
2017-03-02 22:27 ` Linus Torvalds
2017-03-03 1:50 ` Mike Hommey
2017-03-03 2:19 ` Linus Torvalds
2017-03-03 11:04 ` Jeff King
2017-03-03 21:47 ` Stefan Beller
2017-02-25 1:00 ` David Lang
2017-02-25 1:15 ` Stefan Beller
2017-02-25 1:21 ` Jeff King
2017-02-25 1:39 ` David Lang
2017-02-25 1:47 ` Jeff King
2017-02-25 1:56 ` David Lang
2017-02-25 2:28 ` Jacob Keller
2017-02-25 2:26 ` Jacob Keller
2017-02-25 5:39 ` grarpamp
2017-02-24 23:43 ` Ian Jackson
2017-02-25 0:06 ` Ian Jackson
2017-02-25 18:50 ` brian m. carlson
2017-02-25 19:26 ` Jeff King
2017-02-25 22:09 ` Mike Hommey
2017-02-26 17:38 ` brian m. carlson
2017-02-24 22:47 ` Jakub Narębski
2017-02-24 22:53 ` Santiago Torres
2017-02-24 23:05 ` Jakub Narębski
2017-02-24 23:24 ` Øyvind A. Holm
2017-02-24 23:06 ` Jeff King
2017-02-24 23:35 ` Jakub Narębski
2017-02-25 22:35 ` Lars Schneider
2017-02-26 0:46 ` Jeff King
2017-02-26 18:22 ` Junio C Hamano
2017-02-26 18:57 ` Thomas Braun
2017-02-26 21:30 ` Jeff King
2017-02-27 9:57 ` Geert Uytterhoeven
2017-02-27 10:43 ` Jeff King
2017-02-27 12:39 ` Morten Welinder
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