From EETimes: Researchers at Nanyang Technological University in Singapore (NTU Singapore) have developed a quantum chip 1,000 times smaller than current quantum configurations. Led by Professor Liu Ai Qun of NTU’s School of Electrical and Electronic Engineering and associate professor Kwek Leong Chuan, the team’s results were published in Nature Photonics.
The results offer a new opportunity for implementing quantum cryptography methods in many financial systems. This new chip will improve the security context in various communication methods, from the withdrawal of cash from the ATM to the purchase of goods online (see figure). These are technologies that today are not very safe and whose communications can be intercepted. Only 3 to 4 mm wide, the chip uses quantum communication algorithms and provides a higher level of security than existing standards thanks to quantum key distribution (QKD).
QKD uses quantum properties for the exchange of secret information, such as an encrypted key, which can then be used to encrypt messages transmitted over an insecure channel. The security of QKD is based on fundamental laws of nature and physics, which are invulnerable to increasing computing power, new attack algorithms, or quantum computers.
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