KAUST researchers develop laser method for devices to prove their identity online

Researchers at King Abdullah University of Science and Technology (KAUST), Thuwal, Saudi Arabia, have developed a laser-based technology that allows digital devices to verify their identity using their own physical characteristics, “potentially offering a faster and more secure alternative to conventional passwords and security keys,” say its creators.

Published in Nature Electronics, the research addresses what KAUST describes as “a growing challenge facing the digital systems that power cloud computing, artificial intelligence, and connected devices; as these networks grow, so does the need to confirm that every device communicating within them is genuine and has not been copied or compromised,” states the announcement.

The KAUST team developed a system that uses tiny laser devices to generate unique digital fingerprints. Each laser produces its own unique light pattern that can be used to verify identity. The researchers then combined the technology with artificial intelligence, enabling the system to recognize and authenticate those fingerprints almost instantly.

"Every connected device needs a way to prove that it is genuine," said Assistant Professor Yating Wan, who led the research at KAUST. "Today this often relies on stored passwords or security keys. Our approach explores whether devices can instead identify themselves using characteristics that are inherently part of the hardware."

The technology could have future applications in large digital networks where millions of devices, servers, and sensors must communicate securely. This includes cloud computing platforms, AI infrastructure, and connected devices used across industry and everyday life.

‘Authentication responses’

In laboratory testing, the system has generated authentication responses at high speeds while consuming very little energy, suggesting it could support future computing systems where both performance and efficiency are important.

“As artificial intelligence and cloud services continue to expand, there is growing interest in new approaches to digital security that can operate at large sale,” said Wan. “This work demonstrates how photonics and artificial intelligence can be combined to address that challenge.”

The researchers say that they are now continuing to explore how the technology could be integrated into future computing and communications systems.