Title:
Scientists Create a Pattern That Is Impossible to Duplicate – High-Security Identification That Cannot Be Counterfeited
By:
University of Tsukuba
Published:
SciTechDaily, 1 June 2020
https://scitechdaily.com/scientists-create-a-pattern-that-is-impossible-to-duplicate-high-security-identification-that-cannot-be-counterfeited/
From the article:
"Try whispering at one end of the Echo Wall in the Temple of Heaven in Beijing. People at the far end of the curved wall will still hear you, from 65 meters away. This is the whispering-gallery effect. Now, researchers from Japan have used the underlying principles of the whispering-gallery effect to stop counterfeiters in their tracks."