Post
Topic
Board Development & Technical Discussion
Re: Elliptic Curve Point Addition Question
by
Tanagi
on 26/01/2022, 03:24:51 UTC


Code:
L = (y2 - y1) / (x2 - x1)
x3 = L^2 - x1 - x2
y3 = L(x1 - x3) - y1

      y2 - y1 = 94553076844452666078538149424419144783741135675920254371088167625192913487275
      x2 - x1 = 75694105346914480362575934586442506821074289349400393707630734405845016901087
1 / (x2 - x1) = 57109544797366026611537207709745816878454354988638946088653096565731074851657
            L = 26260209610829739695182151635707675950033180086458470318530731088353219693361
          L^2 = 85396884292048511216639145930585800795235676868516676403763378131573495159908
           x3 = 22299113221787846994488776168920263850616409616156953345645360922861305118563
      x1 - x3 = 87194808877201440358869426427379159064426064000963275369055864486481116123229
   L(x1 - x3) = 114457103505967127914246148065726475976734011734324777350232007537745534737470
           y3 = 4557556935953335244676085823642666982350217411134294760123069603436116216826


Thanks again for your help.

To get L, can you break this down further for me please?

Code:
1 / (x2 - x1) = 57109544797366026611537207709745816878454354988638946088653096565731074851657
            L = 26260209610829739695182151635707675950033180086458470318530731088353219693361

If L = (y2 - y1) / (x2 - x1) what does 1 / (x2 - x1) mean?

I don't quite understand, sorry.

Thank you.