Microsoft made Secure Boot a requirement for Windows 11, and has been pushing to use the technology to secure against BIOS rootkits for years. Now, researchers have found that Secure Boot has been compromised on more than 200 device models from Acer, Dell, Gigabyte, Intel, and more. Ars Technica reports that an important cryptographic key was published on GitHub in 2022, by “someone working for multiple US-based device manufacturers.”