Linus claims to know again - this time about licenses:
The new license requires that all keys necessary to run the software must be delivered with the software, for example in the case of Trusted Computing systems that may require a signature of the programs. In Torvalds' opinion, the regulation also covers the private keys of Linux developers and he is not willing to publish his private key.
Yeah, sure, if I interpret a license in the most absurd way possible, I might come up with such an outlandish idea with enough idiocy. If he now only proves to me that his private key is necessary to make the kernel runnable (because that's what it's about in the corresponding section of the GPL v3), then I would agree with him. However, it's going to be difficult, because so far I have always been able to run all Linux kernels without ever needing any key.
You can be against the switch to GPL v3 - there is definitely a problem with the license change in the kernel with the extremely many contributions and authors - but the above "reason" is simply ridiculous.