It is possible to extract encryption keys by recording coil whine with a phone next to the computer (2013 paper)
It is possible to extract encryption keys by recording coil whine with a phone next to the computer (2013 paper)
A more TLDR article about this: https://www.extremetech.com/defense/173108-researchers-crack-the-worlds-toughest-encryption-by-listening-to-the-tiny-sounds-made-by-your-computers-cpu
FAQs from the researchers: https://web.archive.org/web/20230130225254/http://www.cs.tau.ac.il/~tromer/acoustic/