The Cambridge Lab of Toshiba Research Europe says it has has had a major breakthough in its quest to find ultra-secure networks.
It has succeeded in demonstrating continuous operation of quantum key distribution (QKD) with a secure bit rate exceeding 1 Megabit/sec over 50 km of fibre for the first time.
We are not certain, but the technology appears to be based around sticking the key to any encryption around the collar of a cat who may or may not be alive.
Averaged over a 24 hour period, this is 100–1000 times higher than anything reported previously for a 50 km link.
Tosh managed to build a novel light detector for high bit rates and a feedback system which maintains a high bit rate at all times and requires no manual set-up or adjustment.
According to the journal, Applied Physics Letters, which we get for the observe the photon competition, the breakthrough will enable the everyday use of “one-time pad” encryption.
This is a theoretical perfect security which is currently impossible to run because it requires the transmission of very long secret keys which are the same length as the data itself. It can only be used for short messages in situations requiring very high security.
However Tosh things that today’s bit rate breakthrough will mean that the great unwashed can use it to send letters to their grannies so that the lizard people will not read them.