Re: [saag] AD review of draft-iab-crypto-alg-agility-06
Russ Housley <housley@vigilsec.com> Mon, 07 September 2015 21:22 UTC
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From: Russ Housley <housley@vigilsec.com>
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Date: Mon, 07 Sep 2015 17:22:12 -0400
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References: <55A938F1.9090404@cs.tcd.ie> <20150720044849.GY28047@mournblade.imrryr.org> <B866063D-C1A8-4286-83E1-9EBAE7994297@vigilsec.com> <20150902212858.GM9021@mournblade.imrryr.org> <20150903214809.GE1541@localhost>
To: Nico Williams <nico@cryptonector.com>, Viktor Dukhovni <ietf-dane@dukhovni.org>
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Subject: Re: [saag] AD review of draft-iab-crypto-alg-agility-06
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Nico and Viktor: Late last week, you each made comments on Section 2.5. I have tried to address them. The text in my edit buffer is: 2.5. Cryptographic Key Establishment Traditionally, protocol designers have avoided more than one approach to exchanges that establish cryptographic keys because it makes the security analysis of the overall protocol more difficult. When frameworks such as EAP [RFC3748] and SASL [RFC4422] are employed, key establishment is very flexible, often hiding many of the details from the application. This results in protocols that support multiple key establishment approaches. In fact, the key establishment approach itself is negotiable, which creates a design challenge to protect the negotiation of the key establishment approach before it is used to produce cryptographic keys. Protocols can negotiate a key establishment approach, derive an initial cryptographic key, and then authenticate the negotiation. However, if the authentication fails, the only recourse is to start the negotiation over from the beginning. Some environments will restrict the key establishment approaches by policy. Such policies tend to improve interoperability within a particular environment, but they cause problems for individuals that need to work in multiple incompatible environments. I hope the change in terminology helps. Let me know. Russ
- [saag] AD review of draft-iab-crypto-alg-agility-… Stephen Farrell
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Paul Hoffman
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Black, David
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Kathleen Moriarty
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Eliot Lear
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Derek Atkins
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Watson Ladd
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… ianG
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Black, David
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Black, David
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Nico Williams
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Stephen Farrell
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Nico Williams
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Nico Williams
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Stephen Farrell
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Nico Williams
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Stephen Farrell
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Stephen Farrell
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Nico Williams
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Stephen Farrell
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Salz, Rich
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Nico Williams
- Re: [saag] AD review of draft-iab-crypto-alg-agil… ianG
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Christian Huitema
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Kathleen Moriarty
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Martin Thomson
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Salz, Rich
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Kathleen Moriarty
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Salz, Rich
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Stephen Farrell
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Salz, Rich
- Re: [saag] AD review of draft-iab-crypto-alg-agil… David Misell
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Peter Gutmann
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Peter Gutmann
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Peter Gutmann
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Salz, Rich
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Stephen Farrell
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Salz, Rich
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Kathleen Moriarty
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Kathleen Moriarty
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Martin Thomson
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Yoav Nir
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Stephen Farrell
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Paterson, Kenny
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Nico Williams
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Stephen Farrell
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Stephen Farrell
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Paterson, Kenny
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Peter Gutmann
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Eliot Lear
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Nico Williams
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Derek Atkins
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Martin Thomson
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Watson Ladd
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Martin Thomson
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Salz, Rich
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Joel Sing
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Russ Housley
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Russ Housley
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Eliot Lear
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Eliot Lear
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Russ Housley
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Eliot Lear
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Russ Housley
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Russ Housley
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Salz, Rich
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Salz, Rich
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Nico Williams
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Christian Huitema
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Watson Ladd
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Nico Williams
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Derek Atkins
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Russ Housley
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Russ Housley
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Viktor Dukhovni
- Re: [saag] AD review of draft-iab-crypto-alg-agil… Russ Housley