Deter quantum hackers by hiding the keys

摘要

Spotting a lone messenger in a crowd of decoys is tricky - a concept that might make it possible to improve the security of quantum cryptography.rnQuantum links are said to be unhackable because the "key" used to establish a secure channel is encoded into the spin of a photon. If the photon is intercepted, it becomes altered in a detectable way. However, hackers have discovered loopholes that allow them to escape detection, for instance, by intercepting the photons and replacing them with copies.