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Re: [quicwg/base-drafts] Connection ID lengths 1, 2 and 3 bytes can't be encoded (#1570)

Kazuho Oku <notifications@github.com> Tue, 07 August 2018 22:05 UTC

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Subject: Re: [quicwg/base-drafts] Connection ID lengths 1, 2 and 3 bytes can't be encoded (#1570)
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In addition to linkability, the other issue with the proposal is that you could easily run out of CIDs when stateless reset is being used. Quoting from the editors' draft:

> Revealing the Stateless Reset Token allows any entity to terminate the connection, so a value can only be used once. This method for choosing the Stateless Reset Token means that the combination of connection ID and static key cannot occur for another connection.
> https://quicwg.org/base-drafts/draft-ietf-quic-transport.html#rfc.section.6.13.4

Considering the two issues, I prefer not allowing shorter CID lengths in QUICv2 (formerly called v1). P2P can be a post-v2 thing.

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