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To enable the development of wearable devices that possess advanced ultraviolet (UV) detection functions, scientists from
Nanyang Technological University, Singapore (NTU Singapore) have created a new type of light sensor that is both flexible and highly sensitive.
While invisible to the human eye, UV rays surround us in our environment, and excessive exposure can cause health issues including skin cancer and premature skin ageing. The intensity of UV rays is typically reported through an index during weather reports. A wearable device, such as a T-shirt or watch that monitors the actual personal UV exposure throughout the day, would be a useful and more accurate guide for people seeking to avoid sun damage.
Not just free delivery and bulk discounts: In Singapore, the rise of community group buys
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NUS researchers bring attack-proof quantum communication two steps forward
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2021 0708 NUS researchers bring attack-proof quantum communication two steps forward
Assistant Professor Charles Lim (back) and Dr Zhang Gong (front) with their team’s first-of-its-kind quantum power limiter device.
Quantum key distribution (QKD) is a method for secure communication that uses quantum mechanics to encrypt information. While the security of QKD is unbreakable in principle, if it is incorrectly implemented, vital information could still be stolen by attackers. These are known as side-channel attacks, where the attackers exploit weaknesses in the setup of the information system to eavesdrop on the exchange of secret keys.
Researchers from the National University of Singapore (NUS) have developed two methods, one theoretical and one experimental, to ensure that QKD communications cannot be attacked in this way. The first is an ultra-secure cryptography protocol that can be deployed in any communication network that needs long-term security. The second is a first-of-i