Re: [openpgp] AEAD Chunk Size
Benjamin Kaduk <kaduk@mit.edu> Sun, 28 April 2019 03:32 UTC
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Date: Sat, 27 Apr 2019 22:32:07 -0500
From: Benjamin Kaduk <kaduk@mit.edu>
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References: <E65F6E9D-8B0B-466D-936B-E8852F26E1FF@icloud.com> <87d0m9hl62.wl-neal@walfield.org> <FEE9711C-3C64-493C-8125-89696B882E0A@icloud.com> <2di2bK8m-7HtDeoUEH9oPqs-bL-IKSE0CjkgFShPMLOlUyeDBVkVGApdjnIpS6YRAeKU3ibGCZCtwLden-N6zK5W4fqIghRGDa5dU720nEs=@protonmail.com> <73739F8A-5E9F-4277-B053-FDD2E8D81B17@icloud.com> <cc75QwJwTIffqLK7fzZ3A2Pw1Vb3_lkhSHfYRPyASZcxceG2c0Cpbld529WsXosP7X9x4agikpGD4dVTXK8iaRkblS9Jokv1tD2TceQBbyE=@protonmail.com> <18FF6D9C-B285-406E-A344-E6362646DE68@icloud.com> <YMBMgZGGCSQb4Bnp9xRFkBfOn-I97FrycqHK4NvuHUkgtmL6_UaumtHJwJc-4nbmACSHrA4CWqEeLMDUuoVFMq0Vc6M0fwO8G40Mq1heEgI=@protonmail.com> <uIkPmRBGfmyVi5QPuVeXkm02_Y_zfPUWPWCsZtDHyjFaFbNOY8mJyUK42pm80AJ-_-jf-ut1xPK_SMkjGDgrL4cT4BcAbeaBQvSYhqFoD7U=@protonmail.com> <875zr5ywd7.fsf@wheatstone.g10code.de>
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Subject: Re: [openpgp] AEAD Chunk Size
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Hi Werner, On Tue, Apr 23, 2019 at 10:11:16AM +0200, Werner Koch wrote: > On Thu, 18 Apr 2019 17:28, bartbutler=40protonmail.com@dmarc.ietf.org > said: > > > hope Werner likes this because GnuPG is already doing 8KiB chunks, so > > I am not sure about the context. Are you talking about the partial > length encoding or about the AEAD chunk size, a modification of AEAD to > allow detection of transmission errors before the end of the data? > > GnuPG 2.3 creates AEAD chunks not larger than 128 MiB. This can be > changed with an option down to 64 bytes. However such a values is only > useful for regression testing as it slows down the performance. I may > consider to change the default to 1 MiB but not lower. > > Let me repeat that the whole discussion on the size of the AEAD chunks > is mostly off topic because the chunks are _only_ here to allow I'm willing to believe that the reason you state is why it was originally added. But the volume of discussion we've had already makes me pretty skeptical that it remains the only reason people might want to have AEAD chunks, so your argument would be much stronger if you made some reference to the technical subjects that have been raised and why you believe they are not relevant. Thanks, Ben > detection of transmission errors before Gigabytes of data have been > processes. This was the reason why I suggested to Brian the addition of > a chunking mode for AEAD. > > Whether the received data is authentic can only be asserted by checking > the signature and that can obviously only be done after all AEAD chunks > have been decrypted. > > Those implementations wanting to show a preview can do so regardless of > any AEAD validation etc. They should just make clear to the user that > this is an unauthenticated and possible corrupted preview of the data. > > For all other purposes I propose to use a different protocol on top of > OpenPGP a (e.g MIME) and not to overload OpenPGP with unneeded stuff. > Or well, start from scratch and use a different name for it. > > > Salam-Shalom, > > Werner > > -- > Die Gedanken sind frei. Ausnahmen regelt ein Bundesgesetz. > _______________________________________________ > openpgp mailing list > openpgp@ietf.org > https://www.ietf.org/mailman/listinfo/openpgp
- Re: [openpgp] AEAD Chunk Size Justus Winter
- [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Vincent Breitmoser
- Re: [openpgp] AEAD Chunk Size Bart Butler
- Re: [openpgp] AEAD Chunk Size Jon Callas
- Re: [openpgp] AEAD Chunk Size Bart Butler
- Re: [openpgp] AEAD Chunk Size Jon Callas
- Re: [openpgp] AEAD Chunk Size Ronald Tse
- Re: [openpgp] AEAD Chunk Size Ronald Tse
- Re: [openpgp] AEAD Chunk Size Bart Butler
- Re: [openpgp] AEAD Chunk Size Hanno Böck
- Re: [openpgp] AEAD Chunk Size - Performance Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Jon Callas
- Re: [openpgp] AEAD Chunk Size - Performance Bart Butler
- Re: [openpgp] AEAD Chunk Size Bart Butler
- Re: [openpgp] AEAD Chunk Size Bart Butler
- Re: [openpgp] AEAD Chunk Size brian m. carlson
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size - Performance Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Tobias Mueller
- Re: [openpgp] AEAD Chunk Size Sebastian Schinzel
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Werner Koch
- Re: [openpgp] AEAD Chunk Size Vincent Breitmoser
- Re: [openpgp] AEAD Chunk Size Sebastian Schinzel
- Re: [openpgp] AEAD Chunk Size Derek Atkins
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Derek Atkins
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Werner Koch
- Re: [openpgp] AEAD Chunk Size Derek Atkins
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Tobias Mueller
- Re: [openpgp] AEAD Chunk Size Tobias Mueller
- Re: [openpgp] AEAD Chunk Size Tobias Mueller
- Re: [openpgp] AEAD Chunk Size Tobias Mueller
- Re: [openpgp] AEAD Chunk Size Tobias Mueller
- Re: [openpgp] AEAD Chunk Size Werner Koch
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Tobias Mueller
- Re: [openpgp] AEAD Chunk Size Tobias Mueller
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Vincent Breitmoser
- Re: [openpgp] AEAD Chunk Size Peter Pentchev
- Re: [openpgp] AEAD Chunk Size Vincent Breitmoser
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Derek Atkins
- Re: [openpgp] AEAD Chunk Size Vincent Breitmoser
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Vincent Breitmoser
- Re: [openpgp] AEAD Chunk Size Tobias Mueller
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Bill Frantz
- [openpgp] WTF (Re: AEAD Chunk Size) Andre Heinecke
- Re: [openpgp] AEAD Chunk Size Werner Koch
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Werner Koch
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Derek Atkins
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Marcus Brinkmann
- Re: [openpgp] AEAD Chunk Size Nickolay Olshevsky
- Re: [openpgp] AEAD Chunk Size Derek Atkins
- Re: [openpgp] AEAD Chunk Size Tobias Mueller
- Re: [openpgp] AEAD Chunk Size Tobias Mueller
- Re: [openpgp] AEAD Chunk Size Derek Atkins
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Bill Frantz
- Re: [openpgp] AEAD Chunk Size Jon Callas
- Re: [openpgp] AEAD Chunk Size Jon Callas
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Bart Butler
- Re: [openpgp] AEAD Chunk Size Marcus Brinkmann
- Re: [openpgp] AEAD Chunk Size Bill Frantz
- Re: [openpgp] AEAD Chunk Size Jon Callas
- Re: [openpgp] AEAD Chunk Size Peter Gutmann
- Re: [openpgp] AEAD Chunk Size Peter Gutmann
- Re: [openpgp] AEAD Chunk Size Peter Gutmann
- Re: [openpgp] AEAD Chunk Size Peter Gutmann
- Re: [openpgp] AEAD Chunk Size Bill Frantz
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Marcus Brinkmann
- Re: [openpgp] AEAD Chunk Size Marcus Brinkmann
- Re: [openpgp] AEAD Chunk Size Peter Gutmann
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Peter Gutmann
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Jon Callas
- Re: [openpgp] AEAD Chunk Size Wyllys Ingersoll
- Re: [openpgp] AEAD Chunk Size Jon Callas
- Re: [openpgp] AEAD Chunk Size Jon Callas
- Re: [openpgp] AEAD Chunk Size Jon Callas
- Re: [openpgp] AEAD Chunk Size brian m. carlson
- Re: [openpgp] AEAD Chunk Size Bart Butler
- Re: [openpgp] AEAD Chunk Size Benjamin Kaduk
- Re: [openpgp] AEAD Chunk Size Bart Butler
- Re: [openpgp] AEAD Chunk Size Benjamin Kaduk
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Jon Callas
- Re: [openpgp] AEAD Chunk Size Peter Gutmann
- Re: [openpgp] AEAD Chunk Size Bart Butler
- Re: [openpgp] AEAD Chunk Size Benjamin Kaduk
- Re: [openpgp] AEAD Chunk Size Conrado P. L. Gouvêa
- Re: [openpgp] AEAD Chunk Size Conrado P. L. Gouvêa
- Re: [openpgp] AEAD Chunk Size Jon Callas
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Derek Atkins
- Re: [openpgp] AEAD Chunk Size Neal H. Walfield
- Re: [openpgp] AEAD Chunk Size Derek Atkins
- Re: [openpgp] AEAD Chunk Size Derek Atkins
- Re: [openpgp] AEAD Chunk Size Jon Callas
- Re: [openpgp] AEAD Chunk Size Derek Atkins
- Re: [openpgp] AEAD Chunk Size Jon Callas
- Re: [openpgp] AEAD Chunk Size Heiko Stamer
- Re: [openpgp] AEAD Chunk Size Bart Butler
- Re: [openpgp] AEAD Chunk Size Bart Butler
- Re: [openpgp] AEAD Chunk Size Derek Atkins
- Re: [openpgp] AEAD Chunk Size Werner Koch
- Re: [openpgp] AEAD Chunk Size Benjamin Kaduk
- Re: [openpgp] [EXT] Re: AEAD Chunk Size Neil Hunsperger