Re: [Last-Call] Secdir last call review of draft-ietf-alto-cdni-request-routing-alto-17

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Hi, Klaas:
-----邮件原件-----
发件人: Klaas Wierenga via Datatracker [mailto:noreply@xxxxxxxx] 
发送时间: 2021年11月24日 17:24
收件人: secdir@xxxxxxxx
抄送: alto@xxxxxxxx; draft-ietf-alto-cdni-request-routing-alto.all@xxxxxxxx; last-call@xxxxxxxx
主题: Secdir last call review of draft-ietf-alto-cdni-request-routing-alto-17

Reviewer: Klaas Wierenga
Review result: Has Issues

Hi,

I found 1 nit and one more substantial issue

- the abstract says:

OLD
RFC 8008 defines precisely the semantics of FCI and provides guidelines on the FCI protocol, but the exact protocol is specified.

I think it should read

NEW
RFC 8008 defines precisely the semantics of FCI and provides guidelines on the FCI protocol, but the exact protocol is not specified.

- A bigger problem I have is with the Security Considerations

You state "In the context of CDNI Advertisement, additional security
   considerations should be included as follows:", you then list a set of
   concerns, and then write: "Although protection strategies as described in
   Section 15 of [RFC7285] should be applied to address aforementioned security
   and privacy considerations, one additional information leakage risk
   introduced by this document could not be addressed by these strategies. "

So are they ADDITIONAL or were they ALREADY ADRESSED in RFC7285? Do you want to call the ones you list out as specifically relevant for this use-case? Please be clear why you list them here. And if they are NOT sufficiently addressed yet, you need to address them here.
[Qin Wu] : I believe these ADDITIONAL security has already been ADDRESSED by protection strategies proposed in RFC7285, but there is one exception case, i.e.," one additional information leakage risk
   introduced by this document could not be addressed by these strategies."
   Maybe the first paragraph and the second paragraph lack a good connection link, I would propose to make the following change:
   OLD TEXT:
   "
    In the context of CDNI Advertisement, additional security
   considerations should be included as follows:
   "
   NEW TEXT:
   "
    In the context of CDNI Advertisement, the following security
    issues need to be considered as follows:
   "
For the additional risk of leaking info from one uCDN to another uCDN it is unclear to me whether the intended mitigation is meant as normative (SHOULD instead of should) and I am curious why you don't make it a MUST.
[Qin Wu] I have no strong opinion on what language should be used, but I agree SHOULD is better than should.

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