TU/e PhD work explores quantum encryption beyond key creation

PhD researcher Arpan Ray has developed new methods for using continuous-variable quantum systems in practical cryptography, extending its potential beyond secure key exchange. These systems encode information in the amplitude and phase of light, using technology similar to existing optical communication networks, a connection that could accelerate real-world implementation. Ray specifically investigated whether quantum cryptography’s promise holds true when accounting for signal loss, noise, and measurement limitations, challenges that often go unaddressed. He defended his PhD thesis at the Department of Mathematics and Computer Science on September…