Quantum machines, classical panic.

A working notebook on quantum mechanics, the machines being built out of it, and the cryptography that has to survive them. For people who want the physics and the engineering in one place — and who have something real to migrate, on a deadline.

Behind this text: a module lattice — the hard problem underneath ML-KEM. Move your cursor and it finds the nearest lattice point. In two dimensions that takes microseconds. In 256, nobody knows how to do it, and that assumption is what your traffic will rest on.