"New Cryptography Method Promising Perfect Secrecy Is Met With Skepticism"

A team of researchers from King Abdullah University of Science and Technology, the University of St. Andrews, and the Center for Unconventional Processes of Sciences claims to have demonstrated a "perfect secrecy cryptography system" that is resistant to future attacks by quantum computers. Much research on achieving perfect secrecy in cryptography has focussed on using quantum key distribution (QKD) systems. These systems use particles of light known as photons to encode data in quantum bits, which are transmitted to a sender and receiver in the form of an encryption key. However, the deployment of QKD systems would require companies and governments to invest a considerable amount of money into new quantum communication channels. The new perfect secrecy cryptography technique described in the journal, Nature Communications, is said to function using existing optical communication infrastructure. This article continues to discuss how the new method of achieving perfect secrecy in cryptography works, the skepticism about this approach, and other attempts at achieving perfect secrecy using QKD systems. 

IEEE Spectrum reports "New Cryptography Method Promising Perfect Secrecy Is Met With Skepticism"