[curves] Any interest in random curves?

Michael Hamburg mike at shiftleft.org
Thu Jun 26 14:50:34 PDT 2014

On Jun 26, 2014, at 1:56 PM, Trevor Perrin <trevp at trevp.net> wrote:

> On Thu, Jun 26, 2014 at 10:39 AM, Daniel Kahn Gillmor
> <dkg at fifthhorseman.net> wrote:
>> My main concern with this proposal is the possibility of further
>> fragmentation by the creation of yet another set of curves.
> Yeah, if you want to see the confusion that already exists, read the
> W3C discussion on adding Curve25519 to WebCrypto (why not Brainpool?
> why not BADA55?  Microsoft jumps in pushing their curves, etc):
> https://www.w3.org/Bugs/Public/show_bug.cgi?id=25839
> IMO for mainstream purposes the world only needs Curve/Ed25519 and
> *maybe* an extra-strength curve.  The faster people coalesce around
> choices and work out engineering issues the better.  More curve
> families not helpful.

I figured you’d be against :-)  Anyone else want to weigh in on this?

By the way, a small Boggle board has approximately 55-60 bits of entropy if I calculated correctly.  I’m having trouble imagining an attack which would allow a reasonable probability of success with half this much entropy.  So if several boards are used, casino-grade attacks aren’t going to be enough, you’d have to go to magic-trick level.

— Mike

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