Quantum cryptography to satellites for global secure key distribution
John Rarity, Paul Knight, P.M. Gorman, Kotska Wallace, Paul R. Tapster · 2017
We have designed and built a free space secure key exchange system using weak laser pulses with polarisation modulation by acousto-optic switching. We have used this system to exchange keys over a 1.2km ground range with absolute security. Building from this initial result we analyse the feasibility of exchanging keys to a low earth orbit satellite.