Geometric Censorship: The Anti-Counterfeiting Algorithms of the EURion Constellation

Have you ever tried to scan or photocopy a modern banknote, only to have your machine abruptly crash or refuse to print? This frustrating technical barrier is not a glitch; it is the result of a highly classified, hardcoded security measure known as the EURion constellation. Embedded invisibly into the design of almost every major global currency, this specific arrangement of five yellow, green,...