Re: Packet Number Encryption outside of AEAD
Christian Huitema <huitema@huitema.net> Thu, 26 July 2018 21:33 UTC
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From: Christian Huitema <huitema@huitema.net>
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Date: Thu, 26 Jul 2018 14:33:04 -0700
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Subject: Re: Packet Number Encryption outside of AEAD
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On 7/26/2018 9:52 AM, Ian Swett wrote: > That seems like a reasonable suggestion to me. > > Adding Boris and Manasi to see if they also think it'll make hardware > offload easier? > > On Thu, Jul 26, 2018 at 2:22 AM Mikkel Fahnøe Jørgensen > <mikkelfj@gmail.com <mailto:mikkelfj@gmail.com>> wrote: > > I created the following issue a while ago but go no response, so > perhaps it should have been discussed on this list: > > https://github.com/quicwg/base-drafts/issues/1578 > > The issues covers the point, but in summary: > > If the packet format is kept as it is today, but the packet number > is not included in the authenticated data when computing the AEAD > tag, then the decoder need not modify the received packet buffer > when decoding the packet number. This can lead to more efficient > hardware implementations and make multi-processor buffer sharing > more effective. > > Mikkel > It is not just a harware issue. It would make software easier to. Currently, if we want to decrypt a packet, we need to somehow replace the PN bytes with a decrypted version and pass that as "authenticated data" to the AEAD decryption. This is really not necessary, since the decrypted sequence number is included in the IV. -- Christian Huitema
- Packet Number Encryption outside of AEAD Mikkel Fahnøe Jørgensen
- Re: Packet Number Encryption outside of AEAD Ian Swett
- Re: Packet Number Encryption outside of AEAD Christian Huitema
- Re: Packet Number Encryption outside of AEAD Kazuho Oku
- Re: Packet Number Encryption outside of AEAD Mikkel Fahnøe Jørgensen
- Re: Packet Number Encryption outside of AEAD Christian Huitema
- RE: Packet Number Encryption outside of AEAD Deval, Manasi
- Re: Packet Number Encryption outside of AEAD Kazuho Oku
- Re: Packet Number Encryption outside of AEAD Kazuho Oku
- Re: Packet Number Encryption outside of AEAD Mikkel Fahnøe Jørgensen
- Re: Packet Number Encryption outside of AEAD Kazuho Oku
- Re: Packet Number Encryption outside of AEAD Christian Huitema
- Re: Packet Number Encryption outside of AEAD Mikkel Fahnøe Jørgensen
- Re: Packet Number Encryption outside of AEAD Kazuho Oku