Unhackable metasurface holograms: Security technology can lock information with light color and distance

February 3, 2026 - 18:12

A groundbreaking advancement in optical security has been achieved with the creation of "unhackable" metasurface holograms. This new technology, developed by a team of researchers, secures information by locking it to specific parameters of light, namely its color and the viewing distance.

Unlike conventional holograms that display the same image to any observer, this platform uses precisely engineered nanostructures, or metasurfaces, to encode multiple independent images. Crucially, each image is only revealed when illuminated by a very specific wavelength, or color, of light and is viewed from a predetermined distance. An image intended for a red laser, for instance, remains completely invisible under a green one. Similarly, a hologram encoded for a viewing distance of one meter will appear as unintelligible noise if observed from even a few centimeters closer or farther away.

This dual-key system of color and distance creates an exceptionally high-security barrier. It effectively renders the information inaccessible without the exact pair of "keys," making unauthorized duplication or forgery virtually impossible. The technology promises significant applications in anti-counterfeiting measures for high-value items like currency, passports, and pharmaceuticals. It also opens new avenues for ultra-secure data storage and multi-level encryption, where different users can access distinct information from the same physical device based on their authorized credentials. This innovation represents a major leap forward in harnessing light for practical and robust security solutions.