Every transistor has a unique quantum fingerprint—but can it be used as a form of ID?

We might imagine that electric current flows as a smooth, even stream of electrons through our electronics devices, but at the quantum scale the flow of electric current might be more accurately pictured as a bubbling brook containing many tiny ripples. These ripples can be caused by single-electron effects, which arise due to the repulsion among electrons confined in very small spaces, such as trap sites in transistors. Single-electron effects can lead to tiny changes in the current-voltage characteristics of these devices.

source https://www.lifetechnology.com/blogs/life-technology-news-blog/every-transistor-has-a-unique-quantum-fingerprint-but-can-it-be-used-as-a-form-of-id