Re: [P1363:] Possible error in factors in class polynomial (Annex A of P1363-2000)
Hello all
With this change (lambda^bl instead of lambda^-bl) I get the same results as in the annex (to the 5th decimal but that's due to numerical issues) and it all multiplies out to integer coefficients :) Thanks for your help all and your good memory. The version of the annex I used (with the error) is D13 Nov 1999.
Best regards,
Martin Thiim
On 5/23/08, mm <m2@ellipsa.net> wrote:
Hello,
Michael Scott a écrit :
I know this is possibly not much help, but I have a vague recollection of
spotting and fixing an error that I found here, when I was implementing the
CM method about 10 years ago. From memory I informed the list, but also from
memory it wasn't fixed in the Annex.
Was it this one: instead of "lambda^(-BL)", one should use
"lambda^(BL)"?
BTW, this error is in the P1363 Annex A but not in the following doc
Working Draft AMERICAN NATIONAL STANDARD X9.63-199x
Public Key Cryptography For The Financial Services Industry:
Key Agreement and Key Transport Using Elliptic Curve Cryptography
January 8, 1999
For the OP.
Sorry, I did not remember that I corrected something in my code. And,
btw, I still do not remember. I suppose that I read the post of Mike at
the time he sent it and that I corrected the printed doc I was using
*before* writing the code.
Best,
Marcel Martin
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http://www.ellipsa.net/
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