A 200-year-old light trick just transformed quantum encryption

As digital communication accelerates and cyber threats continue to rise, researchers are working to develop more secure ways to transmit information. One of the most promising approaches is quantum cryptography, which uses individual photons to generate encryption keys. A research team from the Faculty of Physics at the University of Warsaw has created and tested a new quantum key distribution (QKD) system within existing city fiber networks. Their approach uses high-dimensional en...