Communications of the ACM
Quantum Secure Communication Breakthrough for China Scientists
Chinese scientists are developing a quantum-technology-based system for more secure communications.
Credit: CFP
Long Guilu, the inventor of quantum-based secure direct communication technology, and his team said they have set a new distance record, sending information securely over 100km (62 miles).
While transmission speeds were slow – at just 0.54 bits per second – it is a significant jump from Long's 2020 record of 18.5km, two decades after he came up with the system, which can detect and prevent eavesdropping attacks.
The transmission speeds were good enough for audio calls and text messages at about 30km, according to Long, a physics professor at Tsinghua University and vice-president of the Beijing Academy of Quantum Information Sciences.
From South China Morning Post (Hong Kong)
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