Layman's Guide to Elliptic-Curve Digital Signatures (2014)
Great guide but I run into a question almost immediately when it says "This line always intersects the elliptic curve at a 3rd point" and then subsequently "This line always intersects the elliptic curve at a 2nd point."<p>Both of those statements seem false, since it's possible to pick points such that you get a vertical line near the left, like by putting the point <i>on</i> the X-axis (0 on the Y-Axis) in the second interactive example. Sure enough, doing so crashes the page.<p>Is there just, like, limitations to where you can place the points? As in, you can place them anywhere <i>so long</i> as you're not creating a vertical line?