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Re: Explicit measurability in the QUIC wire image (was Re: Packet number encryption)

Mikkel Fahnøe Jørgensen <mikkelfj@gmail.com> Wed, 07 February 2018 11:27 UTC

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From: Mikkel Fahnøe Jørgensen <mikkelfj@gmail.com>
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Date: Wed, 07 Feb 2018 03:26:58 -0800
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Subject: Re: Explicit measurability in the QUIC wire image (was Re: Packet number encryption)
To: Kazuho Oku <kazuhooku@gmail.com>
Cc: "Brian Trammell (IETF)" <ietf@trammell.ch>, QUIC WG <quic@ietf.org>
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comment inline

On 7 February 2018 at 12.10.06, Kazuho Oku (kazuhooku@gmail.com) wrote:


To summarize, I think that we need a low frequency signal. It could
either be a square wave or sin wave. Using a sin wave might be better
here, since you the bit pattern (which flips a lot) to observe at a
higher precision when the the error rates of loss and reorder are both
low.



This is a good point. However, you could average the random signal over
multiple bits to get a lower frequency signal which will give you signature
markers even when some segments are lost. A sine is the ultimate low
frequency filter.

There might be a middle ground where you overlay a low frequency signal
into the random sequence.

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