Re: [ipwave] Alissa Cooper's Discuss on draft-ietf-ipwave-ipv6-over-80211ocb-49: (with DISCUSS and COMMENT)
Alissa Cooper <alissa@cooperw.in> Thu, 11 July 2019 13:52 UTC
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From: Alissa Cooper <alissa@cooperw.in>
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Date: Thu, 11 Jul 2019 09:52:08 -0400
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Cc: IESG <iesg@ietf.org>, draft-ietf-ipwave-ipv6-over-80211ocb@ietf.org, Carlos Bernardos <cjbc@it.uc3m.es>, ipwave-chairs@ietf.org, its@ietf.org
To: Nabil Benamar <n.benamar@est.umi.ac.ma>
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Subject: Re: [ipwave] Alissa Cooper's Discuss on draft-ietf-ipwave-ipv6-over-80211ocb-49: (with DISCUSS and COMMENT)
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Hi Nabil, > On Jul 10, 2019, at 4:57 PM, Nabil Benamar <n.benamar@est.umi.ac.ma> wrote: > > Hi Alissa, > > Thanks again for your review. Please see my answers below > > > On Wed, Jul 10, 2019 at 7:27 PM Alissa Cooper via Datatracker <noreply@ietf.org <mailto:noreply@ietf.org>> wrote: > Alissa Cooper has entered the following ballot position for > draft-ietf-ipwave-ipv6-over-80211ocb-49: Discuss > > When responding, please keep the subject line intact and reply to all > email addresses included in the To and CC lines. (Feel free to cut this > introductory paragraph, however.) > > > Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html <https://www.ietf.org/iesg/statement/discuss-criteria.html> > for more information about IESG DISCUSS and COMMENT positions. > > > The document, along with other ballot positions, can be found here: > https://datatracker.ietf.org/doc/draft-ietf-ipwave-ipv6-over-80211ocb/ <https://datatracker.ietf.org/doc/draft-ietf-ipwave-ipv6-over-80211ocb/> > > > > ---------------------------------------------------------------------- > DISCUSS: > ---------------------------------------------------------------------- > > I support Roman's DISCUSS. > > Overall I am unclear on the privacy properties of what this document specifies. > I think it would help to have a clear statement about the circumstances under > which each kind of address generation scheme is recommended. Were RFC 4941 > addresses not considered because addresses generated according to RFC 8064 have > functionally equivalent properties given how often moving vehicle change > subnets? For link-local addresses, is it possible to give recommendations for > when IIDs should be re-generated? > > Here is the new text in -49 > > An example of change policy is to change the MAC > address of the OCB interface each time the system boots up. This may > help mitigate privacy risks to a certain level. Futhermore, for > pricavy concerns ([RFC8065 <https://tools.ietf.org/html/rfc8065>]) recommends using an address generation > scheme rather than addresses generated from a fixed link-layer > address. > I saw this when I read the document but it doesn’t address my questions above. Also in your email to Roni you mentioned other environmental factors that might trigger a change in link-local address, so I was hoping to see that in the document text. Thanks, Alissa > > = Section 5.2 = > > "An Interface ID SHOULD be of length specified in other documents." > > Isn't the length specified for each of the two IID generation mechanisms > discussed in Section 4.3 and 4.4? > > We decided to remove this sentence from the text since ther is no other document. > > = Section 5.3 = > > "The demand for privacy protection of vehicles' and drivers' > identities, which could be granted by using a pseudonym or alias > identity at the same time, may hamper the required confidentiality of > messages and trust between participants" > > Pseudonymity and confidentiality are not mutually exclusive, so I think this is > incorrect. > > I agree. > > > ---------------------------------------------------------------------- > COMMENT: > ---------------------------------------------------------------------- > > Please expand OCB and STA on first use. > > = Section 2 = > > "Note: compliance with > standards and regulations set in different countries when using the > 5.9GHz frequency band is required." > > I'm not familiar with the standards and regulations being referenced here, but > is there any specific reason why this needs to be said here? Presumably users > of regulated spectrum bands the world over must comply with associated > regulations governing their use. It's not clear to me that it makes sense to > note this here. > > = Section 5.1.1 = > > "Further > correlation of this information with other data captured by other > means, or other visual information (car color, others) MAY constitute > privacy risks." > > The normative MAY is not appropriate here. > > = Section 5.2 = > > "In 802.11-OCB networks, the MAC addresses MAY change during well > defined renumbering events." > > The normative MAY is not appropriate here (since this is not the 802.11-OCB > spec). > > > > > -- > > Best Regards > > Nabil Benamar > Associate Professor > Department of Computer Sciences > School of Technology > Moulay Ismail University > Meknes. Morocco
- [ipwave] Alissa Cooper's Discuss on draft-ietf-ip… Alissa Cooper via Datatracker
- Re: [ipwave] Alissa Cooper's Discuss on draft-iet… Nabil Benamar
- Re: [ipwave] Alissa Cooper's Discuss on draft-iet… Alissa Cooper
- Re: [ipwave] Alissa Cooper's Discuss on draft-iet… Nabil Benamar
- Re: [ipwave] Alissa Cooper's Discuss on draft-iet… Alexandre Petrescu
- Re: [ipwave] Alissa Cooper's Discuss on draft-iet… Alexandre Petrescu
- Re: [ipwave] Alissa Cooper's Discuss on draft-iet… Alexandre Petrescu
- Re: [ipwave] Alissa Cooper's Discuss on draft-iet… Alissa Cooper
- Re: [ipwave] Alissa Cooper's Discuss on draft-iet… Nabil Benamar