Arqit Quantum, ESA’s QKDSat partner, is quitting satellites in favor of terrestrial quantum key distribution

by Peter B. de Selding

PARIS —Quantum encryption startup Arqit Quantium Inc., which has a partnership agreement with the European Space Agency (ESA) to build and launch a quantum key distribution satellite, is abandoning its satellite plans after developing a terrestrial technology it says is as good as satellite transmission for all but the most demanding government applications.

The stunning announcement could put into question much of the received wisdom about the superiority of low-orbit satellites for QKD applications. But for now Arqit is asking the wider market, and the company’s investors . . .

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