Re: [Cfrg] I updated 3 drafts related to a FSU KeyEX
"Blumenthal, Uri - 0553 - MITLL" <uri@ll.mit.edu> Thu, 28 April 2016 14:37 UTC
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From: "Blumenthal, Uri - 0553 - MITLL" <uri@ll.mit.edu>
To: "cfrg@irtf.org" <cfrg@irtf.org>
Thread-Topic: [Cfrg] I updated 3 drafts related to a FSU KeyEX
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Date: Thu, 28 Apr 2016 14:36:35 +0000
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Subject: Re: [Cfrg] I updated 3 drafts related to a FSU KeyEX
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I agree with Alyssa and Stephen. -- Regards, Uri Blumenthal On 4/28/16, 6:06 , "Cfrg on behalf of Stephen Farrell" <cfrg-bounces@irtf.org on behalf of stephen.farrell@cs.tcd.ie> wrote: >On 28/04/16 10:58, KATO Akihiro wrote: >> Hi Stephen, >> >> At FSU case, the KGC cannot get session key. >> >> Look the page 7 and 8 of >> https://www.ietf.org/proceedings/94/slides/slides-94-cfrg-0.pdf . The >> session key encrypted ephemeral public key. If the KGC have all static >> secret key, that cannot see session key and plain text. >> >> There is no key escrow on FSU key exchange. > >Eh? Doesn't slide 4 show that the KGC can fake anyone since >it generates their secret keys? That's close enough to mandatory >key escrow for me though sure, perhaps a better term for the >KGC rules-them-all would have been better:-) > >S. > >> >> Regards. >> >> On 2016/04/28 18:26, Stephen Farrell wrote: >>> >>> Hi Mike, >>> >>> On 28/04/16 09:35, Michael Scott wrote: >>>> Maybe the more accurate phrase "n uniquely attractive targets" where >>>> n=2,3,4... doesn't carry quite the same punch! >>> >>> I'm sorry, but for me, it does have exactly the same >>> punch. If there are key generators, they can collude >>> or be coerced. Or even more likely, in a realistic >>> commercial Internet-scale deployment, it's quite likely >>> all of them (even if operated by different entities) >>> may be running on one or two mega-hosting platform, >>> so there may well be only one thing to break into >>> even if it looks like N things. >>> >>> From my POV, the mandatory key escrow aspect of IBE >>> is basically fatal for all but possibly some small >>> set of niche applications. >>> >>> Cheers, >>> S.
- [Cfrg] I updated 3 drafts related to a FSU KeyEX KATO Akihiro
- Re: [Cfrg] I updated 3 drafts related to a FSU Ke… Alyssa Rowan
- Re: [Cfrg] I updated 3 drafts related to a FSU Ke… Michael Scott
- Re: [Cfrg] I updated 3 drafts related to a FSU Ke… Stephen Farrell
- Re: [Cfrg] I updated 3 drafts related to a FSU Ke… Michael Scott
- Re: [Cfrg] I updated 3 drafts related to a FSU Ke… KATO Akihiro
- Re: [Cfrg] I updated 3 drafts related to a FSU Ke… Stephen Farrell
- Re: [Cfrg] I updated 3 drafts related to a FSU Ke… Stephen Farrell
- Re: [Cfrg] I updated 3 drafts related to a FSU Ke… KATO Akihiro
- Re: [Cfrg] I updated 3 drafts related to a FSU Ke… Blumenthal, Uri - 0553 - MITLL
- Re: [Cfrg] I updated 3 drafts related to a FSU Ke… Alex Elsayed