Banks have shown interest in so-called quantum communications for security, which works by sending encrypted data via photon strings, each of which has a "quantum twin." One string is beamed through the air or via optical fibers. A key for decoding the message is then sent "via normal wireless communications. If anyone messes with the photon string en route, the quantum twin will exhibit evidence of the tampering, alerting the sender."

This is seen as a step toward more secure online communications and transactions, but it is still largely an academic experiment. Still, a researcher has come up with a new twist that would add a geographic check to the authentication method. This calls for the key to be broken into three chunks and sent through separate receiver towers positioned around the recipient. That allows for triangulation, which means the recipients' physical location can be checked, notes Popular Science. This would not work for mobile users, but for many corporate transactions, a dedicated system at a specific office may be a good security move. 

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