Section 16.1, due December 2

1. I understand the idea of looking at an ellipse mod an integer, but I do not really understand how it ties to the addition law or how it helps in cryptography.

2. I haven't looked at ellipses for a few years, so it was interesting to see how they are used in the context of cryptography.  I had never thought about looking at an elliptical equation or graph mod an integer. The use of ellipses expands when we do this.