ALEXANDRIA, Va., May 26 -- United States Patent no. 12,640,819, issued on May 26, was assigned to UNIVERSITE DE GENEVE (Geneva) and UNIVERSITAT AUONOMA DE BARCELONA (Barcelona, Spain).

"Apparatus and method for secure space communication" was invented by Hugo Zbinden (Geneva, Switzerland) and Angeles Vazquez Castro (Barcelona, Spain).

According to the abstract* released by the U.S. Patent & Trademark Office: "Free-Space quantum keyless private communication method according to a communication protocol comprising exchanging information between an emitter (100) and a receiver (200) through a main quantum-classical channel and with an eavesdropper tapping said main channel through a wiretap channel, based on the wiretap channel model, wherei...