Geometric cryptography

Geometric cryptography is like a secret code that you can only understand if you have a special key or shape. The key is called a "seed" and it's a special set of points that can be used to make shapes. The shapes alone don't mean anything, but when you use the seed to make the shapes, they become a secret message.

Imagine you have a set of blocks with different shapes, like circles, squares, and triangles. You give your friend the blocks and tell them to make a shape using a special seed. The seed is like a special pattern that you both know. Once your friend makes a shape using the seed and blocks, they send it back to you. Since you know the seed, you can look at the shape and understand the secret message.

This type of cryptography is called "geometric" because it uses shapes and patterns. It's a special way of keeping information secret from people who don't know the secret code or seed. It's like having a secret language that only you and your friend know how to speak.