repository 'http://http.re4son-kernel.com/re4son InRelease not signed

Hi All,

I'm trying to update the arm-image 64 bit on a raspberrypi 4 but i get this error when updating:

sudo apt-get update --allow-insecure-repositories --allow-unauthenticated
[sudo] password for kali:
Get:1 http://http.re4son-kernel.com/re4son kali-pi InRelease [8133 B]
Hit:2 https://ftp.halifax.rwth-aachen.de/kali kali-rolling InRelease
Ign:1 http://http.re4son-kernel.com/re4son kali-pi InRelease
Fetched 8133 B in 1s (6299 B/s)
Reading package lists... Done
W: GPG error: http://http.re4son-kernel.com/re4son kali-pi InRelease: The following signatures were invalid: EXPKEYSIG 11764EE8AC24832F Carsten Boeving <[email protected]>
W: The repository 'http://http.re4son-kernel.com/re4son kali-pi InRelease' is not signed.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.

Does anyone have a fix for this?

Thanks in advance

Stephan

That error means that person's GPG key has expired, so it's no longer valid for signing packages. Try this:

sudo apt-key adv --keyserver keys.gnupg.net --recv-keys 11764EE8AC24832F

That command grabs a new copy of that person's key, with an updated signature, from the GnuPG keyserver. Ignore the warning about apt-key being deprecated; it still works fine for now.