Researchers detail an unpatchable vulnerability in Apple's M-series of chips that lets attackers extract secret keys from Macs during cryptographic operations (Dan Goodin/Ars Technica)
https://arstechnica.com/security/2024/03/hackers-can-extract-secret-encryption-keys-from-apples-mac-chips/
http://www.techmeme.com/240321/p42#a240321p42