Researchers succeed in sending quantum encrypted information over 100m distance

By Park Sae-jin Posted : April 11, 2018, 10:52 Updated : April 11, 2018, 10:52

[Courtesy of ETRI]

SEOUL -- South Korean researchers claimed to have sent a quantum encrypted signal for 100 meters (328 feet) and decrypt it.

Quantum cryptography is a next-generation communication technology which embeds information onto photons, also known as light particles, making it impossible to hack or wiretap. It is considered a vital technology in the future security industry.

The Electronics and Telecommunications Research Institute (ETRI) said in a statement on Wednesday that its researchers have succeeded in connecting two nodes placed on the rooftops of opposite buildings about 100 meters apart, using self-developed quantum cryptography technology.

The test showed an error rate of one percent at night and three percent during the day. Under normal circumstances, quantum-encrypted information can be created if the error rate stays below 11 percent. The institute hopes to extend the maximum range of quantum communication. Its light information technology can be applied to devices such as smartphones and automated teller machines.

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