At a glance, the left image is a starfield with blue diagonal lines representing faster-than-light travel, and the right one is an onion bagel with those FTL lines wrapping around it

elliptic curve cryptography is a way to create secure keys and digital signatures using math on a special type of curve. more info: https://www.allaboutcircuits.com/technical-articles/elliptic-curve-cryptography-in-embedded-systems/