Re: [openpgp] Deprecating compression support
"Derek Atkins" <derek@ihtfp.com> Mon, 18 March 2019 13:32 UTC
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Date: Mon, 18 Mar 2019 09:31:55 -0400
From: Derek Atkins <derek@ihtfp.com>
To: "Neal H. Walfield" <neal@walfield.org>
Cc: Justus Winter <justuswinter@gmail.com>, openpgp@ietf.org
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Archived-At: <https://mailarchive.ietf.org/arch/msg/openpgp/54b5omdKzEgKzyoAJOanisnLw2Y>
Subject: Re: [openpgp] Deprecating compression support
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Hi, On Mon, March 18, 2019 9:22 am, Neal H. Walfield wrote: > Hi Justus, > > Thanks for bringing this up. > > On Mon, 18 Mar 2019 13:07:21 +0100, > Justus Winter wrote: >> I propose to deprecate compression support in OpenPGP. >> ... >> I realize that we cannot suddenly drop decompression support, but I >> would suggest to stop emitting compressed data packets. If this >> proposal gathers traction, I would be happy to suggest a change to the >> standard. > > I propose that we change the standard to say: > > - Compliant implementations MUST NOT emit compressed data packets. I would lessen this a tiny bit and say SHOULD NOT. I can still imagine cases where one MAY want to emit a compressed data packet, especially if the sender and receiver have some out-of-band knowledge. > - For backwards compatibility, compliant implementations MAY > decompress compressed data packets. I would also change this to SHOULD, because IMHO backwards compatibility is important and there are decades of compressed data out there. > Obviously, we should deprecate the "Preferred Compression Algorithms" > subpacket as well. > > Note: removing compression support was one of the original goals: > > Subject: [openpgp] details of 4880bis work > From: Stephen Farrell <stephen.farrell@cs.tcd.ie> > Message-ID: <5527B621.3040104@cs.tcd.ie> > Date: Fri, 10 Apr 2015 12:38:09 +0100 > Archived-At: > <http://mailarchive.ietf.org/arch/msg/openpgp/ll36RGS81vXSXkVey0cR0zZ7WkI> > > ... > > g) remove compression entirely I am not against removing it, but it should be deprecated first IMHO. > ... > > :) Neal -derek -- Derek Atkins 617-623-3745 derek@ihtfp.com www.ihtfp.com Computer and Internet Security Consultant
- [openpgp] Deprecating compression support Justus Winter
- Re: [openpgp] Deprecating compression support Vincent Breitmoser
- Re: [openpgp] Deprecating compression support Neal H. Walfield
- Re: [openpgp] Deprecating compression support Derek Atkins
- Re: [openpgp] Deprecating compression support Vincent Breitmoser
- Re: [openpgp] Deprecating compression support James Howard
- Re: [openpgp] Deprecating compression support Justus Winter
- Re: [openpgp] Deprecating compression support Jon Callas
- Re: [openpgp] Deprecating compression support Andrey Jivsov
- Re: [openpgp] Deprecating compression support Peter Gutmann
- Re: [openpgp] Deprecating compression support Jon Callas
- Re: [openpgp] Deprecating compression support Vincent Breitmoser
- Re: [openpgp] Deprecating compression support Justus Winter
- Re: [openpgp] Deprecating compression support Andre Heinecke
- Re: [openpgp] Deprecating compression support Vincent Breitmoser
- Re: [openpgp] Deprecating compression support Andre Heinecke
- Re: [openpgp] Deprecating compression support Andre Heinecke
- Re: [openpgp] Deprecating compression support Daniel A. Nagy
- Re: [openpgp] Deprecating compression support Bart Butler
- Re: [openpgp] Deprecating compression support Jon Callas
- Re: [openpgp] Deprecating compression support Jon Callas
- Re: [openpgp] Deprecating compression support Marcus Brinkmann
- Re: [openpgp] Deprecating compression support Gregory Maxwell
- Re: [openpgp] Deprecating compression support Werner Koch
- Re: [openpgp] Deprecating compression support Jon Callas
- Re: [openpgp] Deprecating compression support Werner Koch
- Re: [openpgp] Deprecating compression support Ronald Tse
- Re: [openpgp] Deprecating compression support Derek Atkins
- Re: [openpgp] Deprecating compression support Bart Butler
- Re: [openpgp] Deprecating compression support Jon Callas
- Re: [openpgp] Deprecating compression support Jon Callas
- Re: [openpgp] Deprecating compression support ilf
- Re: [openpgp] Deprecating compression support Daniel Kahn Gillmor
- [openpgp] 4880bis status Neal H. Walfield
- Re: [openpgp] Deprecating compression support Neal H. Walfield
- Re: [openpgp] Deprecating compression support Neal H. Walfield
- Re: [openpgp] Deprecating compression support Andre Heinecke
- Re: [openpgp] Deprecating compression support Neal H. Walfield
- Re: [openpgp] Deprecating compression support Benjamin Kaduk
- Re: [openpgp] 4880bis status Bart Butler