Re: [Cfrg] Consensus and a way forward

"Paterson, Kenny" <Kenny.Paterson@rhul.ac.uk> Thu, 27 November 2014 10:18 UTC

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From: "Paterson, Kenny" <Kenny.Paterson@rhul.ac.uk>
To: Hannes Tschofenig <hannes.tschofenig@gmx.net>, Benjamin Black <b@b3k.us>, "cfrg@irtf.org" <cfrg@irtf.org>
Thread-Topic: [Cfrg] Consensus and a way forward
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Date: Thu, 27 Nov 2014 10:05:43 +0000
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Subject: Re: [Cfrg] Consensus and a way forward
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Hannes,

To be fair to Ben, the chairs have been dragging their heels here, so it's
not surprising that other people have stepped in to fill the apparent
vacuum. 

You are technically correct that only chairs should call for consensus. I
think Ben's use of the word referred to a different kind of consensus: one
between Google and Microsoft.

Like you, I think it's helpful that Google and Microsoft have combined to
make this proposal in an effort to move things forward. I hope we can
discuss it dispassionately.

Regards,

Kenny

On 27/11/2014 06:51, "Hannes Tschofenig" <hannes.tschofenig@gmx.net>; wrote:

>Hi Benjamin,
>
>while I applaud that you are trying to find a way forward your mail
>almost sounds like you are acting is one of the chairs of the group.
>
>From a process point of view only the chairs can call for consensus; I
>am sure it is just unfortunate wording and you are providing another
>proposal for the group to consider.
>
>Ciao
>Hannes
>
>On 11/27/2014 05:25 AM, Benjamin Black wrote:
>> All,
>> 
>> Over the past couple of weeks we have been working with Adam Langley to
>> see if we could find a compromise with which we could all live. I'm
>> pleased to say we have been successful in accommodating our respective
>> performance and trustworthy generation concerns, and I hope the
>> resulting proposal will be attractive to others, as well. The generation
>> procedure is document in a draft I've just posted that can be found at
>> http://www.ietf.org/id/draft-black-rpgecc-00.txt .
>> 
>> The simplest summary is that we have combined the prime preferred by
>> Adam and others at the 128-bit security level with the rigid parameter
>> generation we view as essential for producing the most trustworthy
>> curves. We have used the generation procedure to produce a new twisted
>> Edwards curve based on 2^255 - 19 and a new Edwards curve based on 2^384
>> - 317. These new curves are given as test vectors in the draft, and are
>> also given below.
>> 
>> These 2 curves are sufficient for meeting the request from TLS. However,
>> if there is strong interest in a 3rd curve for the 256-bit security
>> level, the generation procedure‚Äč‚Äč gives the same curve with p =2^521 - 1
>> as several teams produced.
>> 
>> 
>> b
>> 
>> --
>> 
>> 2^255 - 19
>> 
>>    p = 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
>>          FFFFFFFFFFED
>>    d = 0x15E93
>>    r = 0x2000000000000000000000000000000016241E6093B2CE59B6B9
>>          8FD8849FAF35
>> x(P) = 0x3B7C1D83A0EF56F1355A0B5471E42537C26115EDE4C948391714
>>          C0F582AA22E2
>> y(P) = 0x775BE0DEC362A16E78EFFE0FF4E35DA7E17B31DC1611475CB4BE
>>          1DA9A3E5A819
>>    h = 0x4
>> 
>> 
>> 2^384 - 317
>> 
>>      p = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
>>            FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEC3
>>      d = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
>>            FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFD19F
>>      r = 0x3FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE2471A1
>>            CB46BE1CF61E4555AAB35C87920B9DCC4E6A3897D
>>   x(P) = 0x61B111FB45A9266CC0B6A2129AE55DB5B30BF446E5BE4C005763FFA
>>            8F33163406FF292B16545941350D540E46C206BDE
>>   y(P) = 0x82983E67B9A6EEB08738B1A423B10DD716AD8274F1425F56830F98F
>>            7F645964B0072B0F946EC48DC9D8D03E1F0729392
>>      h = 0x4
>> 
>> 
>> 
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>