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Re: [Cfrg] Summary of the poll: Elliptic Curves - signature scheme: friendliness to low memory implementations (ends on June 3rd)

"Blumenthal, Uri - 0553 - MITLL" <uri@ll.mit.edu> Fri, 19 June 2015 20:24 UTC

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From: "Blumenthal, Uri - 0553 - MITLL" <uri@ll.mit.edu>
To: Tony Arcieri <bascule@gmail.com>
Thread-Topic: [Cfrg] Summary of the poll: Elliptic Curves - signature scheme: friendliness to low memory implementations (ends on June 3rd)
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Date: Fri, 19 Jun 2015 20:24:48 +0000
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Subject: Re: [Cfrg] Summary of the poll: Elliptic Curves - signature scheme: friendliness to low memory implementations (ends on June 3rd)
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> On Fri, Jun 19, 2015 at 11:04 AM, Blumenthal, Uri - 0553 - MITLL
> <uri@ll.mit.edu> wrote:
>> Yes EdDSA(H(m)) is weaker, but (a) this weakness is negligible even from
>> the theoretical point of view
> 
> Uhh, remember Flame? Collisions have been used in real-world attacks against
> the X.509 PKI.

Uhh, IMHO we are supposed to be practical even when paranoid. I find it
certain that we all would be beyond caring by the time collisions are
produced in SHA-3.

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