Re: [Drip] Handling appendices (was RE: Iotdir early review of draft-ietf-drip-rid-07)

[[e-mail]]

Hi Bob, 

This looks good. Thanks. 

One comment though, I would move 1.1 and position it after we introduce HHIT.

Appendix B is fine where it is now. 

Cheers,
Med

> -----Message d'origine-----
> De : Robert Moskowitz [mailto:[e-mail]]
> Envoyé : lundi 12 juillet 2021 22:53
> À : BOUCADAIR Mohamed INNOV/NET <[e-mail]>
> Cc : [e-mail]; [e-mail]
> Objet : Re: Handling appendices (was RE: [Drip] Iotdir early review
> of draft-ietf-drip-rid-07)
> 
> Below is the revised ToC.  APpendix B should be merged into sec 6 at
> some point.
> 
> As to Host_ID, I started using it in '98.  It was one of the
> namespaces in the IAB Namespace Research Group.  Others have latched
> on to it over the years, but ...
> 
> Table of Contents
> 
>     1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . .
> .   3
>       1.1.  Nontransferablity of HHITs  . . . . . . . . . . . . . .
> .   4
>     2.  Terms and Definitions . . . . . . . . . . . . . . . . . . .
> .   4
>       2.1.  Requirements Terminology  . . . . . . . . . . . . . . .
> .   4
>       2.2.  Notations . . . . . . . . . . . . . . . . . . . . . . .
> .   4
>       2.3.  Definitions . . . . . . . . . . . . . . . . . . . . . .
> .   5
>     3.  The Hierarchical Host Identity Tag (HHIT) . . . . . . . . .
> .   6
>       3.1.  HHIT prefix . . . . . . . . . . . . . . . . . . . . . .
> .   6
>       3.2.  HHIT Suite IDs  . . . . . . . . . . . . . . . . . . . .
> .   7
>         3.2.1.  8 bit HIT Suite IDs . . . . . . . . . . . . . . . .
> .   7
>       3.3.  The Hierarchy ID (HID)  . . . . . . . . . . . . . . . .
> .   7
>         3.3.1.  The Registered Assigning Authority (RAA)  . . . . .
> .   7
>         3.3.2.  The Hierarchical HIT Domain Authority (HDA) . . . .
> .   8
>       3.4.  Edward Digital Signature Algorithm for HITs . . . . . .
> .   8
>         3.4.1.  HOST_ID . . . . . . . . . . . . . . . . . . . . . .
> .   8
>         3.4.2.  HIT_SUITE_LIST  . . . . . . . . . . . . . . . . . .
> .   9
>       3.5.  ORCHIDs for Hierarchical HITs . . . . . . . . . . . . .
> .   9
>         3.5.1.  Adding additional information to the ORCHID . . . .
> .  10
>         3.5.2.  ORCHID Encoding . . . . . . . . . . . . . . . . . .
> .  11
>         3.5.3.  ORCHID Decoding . . . . . . . . . . . . . . . . . .
> .  13
>         3.5.4.  Decoding ORCHIDs for HITv2  . . . . . . . . . . . .
> .  13
>       3.6.  Encoding HHITs in CTA 2063-A Serial Numbers . . . . . .
> .  13
>     4.  Hierarchical HITs as Remote ID  . . . . . . . . . . . . . .
> .  14
>       4.1.  Hierarchical HITs encoded as CTA-2063-A Serial Numbers
> .  14
>       4.2.  Remote ID as one class of Hierarchical HITs . . . . . .
> .  14
>       4.3.  Hierarchy in ORCHID Generation  . . . . . . . . . . . .
> .  15
>       4.4.  Hierarchical HIT Registry . . . . . . . . . . . . . . .
> .  15
>       4.5.  Remote ID Authentication using HHITs  . . . . . . . . .
> .  15
>     5.  UAS ID HHIT in DNS  . . . . . . . . . . . . . . . . . . . .
> .  16
>     6.  DRIP Proofs . . . . . . . . . . . . . . . . . . . . . . . .
> .  17
>       6.1.  Claim / Assertion: HHIT . . . . . . . . . . . . . . . .
> .  17
>       6.2.  Self-Attestation: Attestation(X,X)  . . . . . . . . . .
> .  17
>         6.2.1.  Concise Self-Attestation: Attestation(X, ConciseX)
> .  19
>       6.3.  Certificate(X, Y) . . . . . . . . . . . . . . . . . . .
> .  21
>         6.3.1.  Concise Certificate(X, Concise Y) . . . . . . . . .
> .  22
>       6.4.  Offline Broadcast Attestation: Attestation(X, Offline
>             Y)  . . . . . . . . . . . . . . . . . . . . . . . . . .
> .  24
>       6.5.  Timestamps  . . . . . . . . . . . . . . . . . . . . . .
> .  25
>       6.6.  Signatures  . . . . . . . . . . . . . . . . . . . . . .
> .  25
>     7.  Other UTM uses of HHITs . . . . . . . . . . . . . . . . . .
> .  25
>     8.  DRIP Requirements addressed . . . . . . . . . . . . . . . .
> .  25
>     9.  ASTM Considerations . . . . . . . . . . . . . . . . . . . .
> .  25
>     10. IANA Considerations . . . . . . . . . . . . . . . . . . . .
> .  26
>       10.1.  New IPv6 prefix needed for HHITs . . . . . . . . . . .
> .  26
>     11. Security Considerations . . . . . . . . . . . . . . . . . .
> .  27
>       11.1.  Hierarchical HIT Trust . . . . . . . . . . . . . . . .
> .  27
>       11.2.  Collision risks with Hierarchical HITs . . . . . . . .
> .  28
>       11.3.  Proofs Considerations  . . . . . . . . . . . . . . . .
> .  28
>     12. References  . . . . . . . . . . . . . . . . . . . . . . . .
> .  28
>       12.1.  Normative References . . . . . . . . . . . . . . . . .
> .  29
>       12.2.  Informative References . . . . . . . . . . . . . . . .
> .  29
>     Appendix A.  EU U-Space RID Privacy Considerations  . . . . . .
> .  32
>     Appendix B.  Example HHIT Self Attestation  . . . . . . . . . .
> .  32
>       B.1.  HHIT Offline Self Attestation . . . . . . . . . . . . .
> .  33
>     Appendix C.  Calculating Collision Probabilities  . . . . . . .
> .  34
>     Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . .
> .  34
>     Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . .
> .  34
> 
> 
> On 7/9/21 11:45 AM, [e-mail] wrote:
> > Hi Rob,
> >
> > To start the discussion, here is my current take on the
> appendices:
> >
> >
> >     Appendix A.  EU U-Space RID Privacy Considerations  . . . . .
> . .
> > 13
> >
> > Med: Can be kept as an appendix.
> >
> >     Appendix B.  The Hierarchical Host Identity Tag (HHIT)  . . .
> . .
> > 14
> >
> > Med: Should definitely move to the main document.
> >
> >
> >     Appendix C.  ORCHIDs for Hierarchical HITs  . . . . . . . . .
> . .
> > 17
> >
> > Med: Idem as the previous one.
> >
> >     Appendix D.  Edward Digital Signature Algorithm for HITs  . .
> . .  20
> >       D.1.  HOST_ID . . . . . . . . . . . . . . . . . . . . . . .
> . .
> > 21
> >
> > Med: I would avoid the use of HOST_ID as it conflicts with RFC6967
> and many other RFCs.
> >
> >       D.2.  HIT_SUITE_LIST  . . . . . . . . . . . . . . . . . . .
> . .  21
> >     Appendix E.  Example HHIT Self Attestation  . . . . . . . . .
> . .  22
> >       E.1.  HHIT Offline Self Attestation . . . . . . . . . . . .
> . .
> > 23
> >
> > Med: Can be kept as an appendix.
> >
> >     Appendix F.  DRIP Proofs  . . . . . . . . . . . . . . . . . .
> . .  24
> >       F.1.  Claim / Assertion: HHIT . . . . . . . . . . . . . . .
> . .  24
> >       F.2.  Self-Attestation: Attestation(X,X)  . . . . . . . . .
> . .  24
> >         F.2.1.  Concise Self-Attestation: Attestation(X, ConciseX)
> .  26
> >       F.3.  Certificate(X, Y) . . . . . . . . . . . . . . . . . .
> . .  28
> >         F.3.1.  Concise Certificate(X, Concise Y) . . . . . . . .
> . .  29
> >       F.4.  Offline Broadcast Attestation: Attestation(X, Offline
> >             Y)  . . . . . . . . . . . . . . . . . . . . . . . . .
> . .  31
> >       F.5.  Timestamps  . . . . . . . . . . . . . . . . . . . . .
> . .  32
> >       F.6.  Signatures  . . . . . . . . . . . . . . . . . . . . .
> . .
> > 32
> >
> > Med: To be move the main document.
> >
> >     Appendix G.  Calculating Collision Probabilities  . . . . . .
> . .
> > 32
> >
> > Med: To be kept as an appendix.
> >
> > Cheers,
> > Med
> >
> >> -----Message d'origine-----
> >> De : Robert Moskowitz [mailto:[e-mail]] Envoyé :
> >> vendredi 9 juillet 2021 17:35 À : Michael Richardson
> >> <[e-mail]>; iot- [e-mail] Cc :
> >> [e-mail]; [e-mail] Objet : Re:
> [Drip]
> >> Iotdir early review of draft-ietf-drip-rid-07
> >>
> >>
> >>
> >> On 7/8/21 12:29 PM, Michael Richardson via Datatracker wrote:
> >>> Reviewer: Michael Richardson
> >>> Review result: Almost Ready
> >>>
> >>> Reviewer: Michael Richardson
> >>>
> >>> Review result: Ready with Nits
> >>> Document: draft-ietf-drip-rid-07
> >>> Summary: Almost Ready
> >>>
> >>> I have done an IoT-Directorate review of draft-ietf-drip-rid-07.
> >>> I think that I have previously read the document prior to WG
> >> adoption.
> >>> While the core content of the document is all present, and it
> >> would
> >>> appear that code could be written from it,  the text in the
> >> document
> >>> is pretty rough shape.
> >>>
> >>> The document needs an editorial pass to make the language a bit
> >> less abrupt.
> >>> There is a lot of content in the appendixes (more than 70% or
> so),
> >> and
> >>> I didn't see a lot of forward references to them.  Do we need
> them
> >> all?
> >>
> >> Much of the appendices came from merging documents.  I am waiting
> to
> >> see what feedback I get on what should be moved into the core
> doc.
> >> And appendices E & F need to be merged into one, as they came
> from
> >> different source documents.
> >>
> >>
> >>>
> >>> Nits:
> >>>
> >>> I stumbled on the very first sentence:
> >>>
> >>>     [drip-requirements] describes a UAS ID as a "unique (ID-4),
> >> non-spoofable
> >>>     (ID-5), and identify a registry where the ID is listed (ID-
> 2)";
> >> all within
> >>>             ^^^^^^^^^^^^^^^ <- just does not flow with the rest
> of
> >> the sentence.
> >>>     a 20 character Identifier (ID-1).
> >>>
> >>> In general, I'd rather that the first word wasn't a reference.
> >>> Maybe just move that sentence to the end of the Introduction, or
> >> at
> >>> least maybe two or three paragraphs down.
> >>>
> >>> s/This is in contrast to general IDs (e.g. a UUID or device
> serial
> >> number) as
> >>>          the subject in an X.509 certificate./
> >>>     This is in contrast to using general IDs (e.g. a UUID or
> device
> >> serial number) as
> >>>          the subject in an [RFC5280] X.509 certificate./
> >>>
> >>> a) please expand "CA" in the intro on first use.
> >>> b) please consider if this just belongs in Security
> >> Considerations.
> >>>      "In a multi-CA PKI, a subject can occur in multiple CAs,
> >> possibly
> >>>      fraudulently. CAs within the PKI would need to implement an
> >> approach to
> >>>      enforce assurance of uniqueness."
> >> In review of this para and comments, I can see this needs a good
> >> rewrite.  Again, it came from multiple sources and is a bit of a
> >> mashup.
> >>
> >>> Maybe write:
> >>>      "The use of multiple Certification Authorities (CA), such
> as
> >> used for the
> >>>      public WebPKI comes with the risk of duplicates among the
> >> different CAs.
> >>>      These can occur due to fraud or error, and to date the
> WebPKI
> >> has not
> >>>      found a way to prevent this, only to detect the occurance
> >> afterwards.
> >>>      [reference to certtrans]
> >>>
> >>> } 1.1. Nontransferablity of HHITs
> >>> } HIs and its HHITs SHOULD NOT be transferable between UA or
> even
> >>> between } replacement electronics for a UA. The private key for
> >> the HI
> >>> SHOULD be held } in a cryptographically secure component.
> >>>
> >>> I agree that this is true.  But, I think that some additional
> >>> explanation is waranteed.  I know that we had the discussion
> about
> >>> rebuilding entire air frames, where every single component is
> >> changed,
> >>> and yet, it's the same airframe.
> >> ok.
> >>
> >>> } TYPE-3
> >>> } A UTM system assigned UUID [RFC4122], which can but need not
> be
> >> dynamic.
> >>> maybe write:
> >>>         A UTM system assigned UUID [RFC4122]. These can be
> dynamic,
> >> but
> >>>         do not need to be.
> >>>
> >>> } 3.1. Hierarchical HITs encoded as CTA-2063-A Serial Numbers
> >>>
> >>> please give me an example of a CTA-2063-A serial number, and
> >> please
> >>> give me an example of a HHIT encoded as one.... AHA. Appendix
> B.4,
> >> so
> >>> a forward reference, please?... ah, but no actual example in
> B.4.
> >> AX Enterprize now has its own manufacturer code so we can now
> >> generate examples.  This is recent.
> >>
> >>> 3.3:
> >>> } The justification then was attacks against these fields are
> DoS
> >> attacks
> >>>     against protocols using them.
> >>>
> >>> Please reword, as this doesn't look like a sentence to me.
> >>>
> >>> } The individual HHITs are potentially too numerous (e.g. 60 -
> >> 600M)
> >>> and } dynamic to actually store in a signed, DNS zone.
> >>>
> >>> This point has been disputed before. .com is much larger,  and
> we
> >>> don't have 600M of them on day one.  I.e. by the time we really
> >> have
> >>> 600M of them, then there will be a business justification for
> >> investing in the required hardware.
> >>
> >> I lost track that .com has grown that large.  But I realize that
> >> point that is needed is the timing of additions.  A HHIT as a
> short-
> >> live Session ID could be requested minutes before the flight. And
> >> these can keep coming in every few minutes through the course of
> the
> >> day, making zone signing really challenging.  Or so it seems to
> me?
> >>
> >>> section 9, please start by explaining what a HHIT hijacking
> *is*,
> >> and what
> >>>           the operational impact of such a thing occuring is.
> >>>
> >>>
> >>>
> >>>
> >>>
> >> Anything I did not respond to here is a comment I will work on.
> >>
> >> Thanks
> >
> >
> ____________________________________________________________________
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