Complete News World

Bit Noise, Processor Podcast: UEFI Secure Boot in Detail

Bit Noise, Processor Podcast: UEFI Secure Boot in Detail

The C't Wizard Podcast is available every second Wednesday…

Different operating systems can run on an x86 computer with an AMD or Intel processor. During the boot process, the UEFI BIOS executes the boot loader for the operating system in question. These bootloaders are attractive targets for malicious hackers.


The UEFI Secure Boot function aims to prevent tampered bootloaders, so-called boot kits, from implanting themselves on your computer. But at the beginning of 2023, a BlackLotus attack was discovered, which compromises UEFI Secure Boot.

Microsoft is responding to this with an addition to Secure Boot: Code Integrity Boot Policy. The Linux community relies on Secure Boot Advanced Targeting (SBAT).

c't editor Ulrike Kuhlmann discusses what these profound changes mean for Windows PCs with her colleague Christoph Wendeck in the 2024/7 episode of “Bit-Rauschen: The processor podcast from c't”.

More information about UEFI Secure Boot and Windows Code Integrity Boot Policy is available c't 7/2024.

Bit Noise Podcast, Episode 2024/7:

Listen to this too

  • Episode 2023/23 of “Bit Noise: The Wizard of C't Podcast”: The Power of the Digital Key:

Bit-Rauschen magazine column from c't 7/2024: Intel plans public Magdeburg chip factories

Thanks to Germany's love of bureaucracy, we know more about Intel's plans in Saxony-Anhalt. Intel processors throttle at high frequencies and AMD struggles with Linux drivers.

We welcome suggestions, praise and criticism about Little Noise. Please send comments via email to [email protected].

c't 7/2024 Available at kiosk, in browser, and in the c't app for iOS and Android

All episodes of our podcast as well as the c't Bit-Rauschen column can be found at


To the home page