|Bill Allombert on Tue, 28 Jan 2014 14:17:31 +0100|
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|Re: Your help needed|
On Tue, Jan 28, 2014 at 08:05:27AM +0900, SeongHan Shin wrote: > Dear Bill, > > >I assume you want to compute the order of a point on a elliptic curve > >over a finite field of size around 512bit. > >Unfortunately the number of points on the curve is too hard to be factored > >by PARI. > Yes, that's exactly what I want to do. > Is there any way to compute a 512-bit order? Not unless you know the factorisation of the order of the elliptic curve, or some similar useful information Cheers, Bill.