[1]https://www.newscientist.com/article/2315672-harmful-chips-hidden-on-circuit-
boards-revealed-by-their-power-use/

Harmful chips hidden on circuit boards revealed by their power use

   Careful observation of the power consumption of a circuit board can
   reveal telltale signs that an attacker has tampered with it and
   installed a malicious device designed to steal sensitive information or
   cause crashes, say researchers.

   [2]TECHNOLOGY


   April 18, 2022 07:00

   By [3]Matthew Sparkesanufacturers often design printed circuit boards
   for their products but lack manufacturing capability, so they outsource
   production. Experts warn that these factories are a point of
   vulnerability where an attacker could insert malicious features, known
   as Trojan attacks. These Trojan attacks could steal sensitive data or
   crash a device when triggered.

   Only one such attack has ever been reported in the wild, [4]detailed in
   a Bloomberg article in 2018, but later denied by all companies
   mentioned. [5]Theodore Markettos at the University of Cambridge  says
   that no firm …

References

   1. https://www.newscientist.com/article/2315672-harmful-chips-hidden-on-circuit-boards-revealed-by-their-power-use/
   2. https://www.newscientist.com/subject/technology/
   3. https://www.newscientist.com/author/matthew-sparkes/
   4. https://www.bloomberg.com/news/features/2018-10-04/the-big-hack-how-china-used-a-tiny-chip-to-infiltrate-america-s-top-companies
   5. https://www.cl.cam.ac.uk/~atm26/