The following signatures were invalid: EXPKEYSIG ED444FF07D8D0BF6 Kali Linux Repository

I just tried to update one my Kali Virtual Machine and received the following error:

root@kali:~# 
root@kali:~# apt-get update
Get:1 http://kali.mirror.garr.it/mirrors/kali kali-rolling InRelease [30.5 kB]
Err:1 http://kali.mirror.garr.it/mirrors/kali kali-rolling InRelease
  The following signatures were invalid: EXPKEYSIG ED444FF07D8D0BF6 Kali Linux Repository <devel@kali.org>
Reading package lists... Done
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://kali.mirror.garr.it/mirrors/kali kali-rolling InRelease: The following signatures were invalid: EXPKEYSIG ED444FF07D8D0BF6 Kali Linux Repository <devel@kali.org>
W: Failed to fetch http://http.kali.org/kali/dists/kali-rolling/InRelease  The following signatures were invalid: EXPKEYSIG ED444FF07D8D0BF6 Kali Linux Repository <devel@kali.org>
W: Some index files failed to download. They have been ignored, or old ones used instead.
root@kali:~

It seems like the APT GPG Key expired. Searched around and the found that the following solution worked for most people:

root@kali:~# apt-key adv --keyserver hkp://keys.gnupg.net --recv-keys 7D8D0BF6
Executing: /tmp/apt-key-gpghome.Ze2Ri87qe6/gpg.1.sh --keyserver hkp://keys.gnupg.net --recv-keys 7D8D0BF6
gpg: key ED444FF07D8D0BF6: 133 signatures not checked due to missing keys
gpg: key ED444FF07D8D0BF6: "Kali Linux Repository <devel@kali.org>" 135 new signatures
gpg: Total number processed: 1
gpg:         new signatures: 135
root@kali:~#

After that, you simply try to run apt-get update and it should just work as normal.

Apparently the above solution didn’t work for few, here’s an alternative solution:

root@kali:~# wget https://http.kali.org/kali/pool/main/k/kali-archive-keyring/kali-archive-keyring_2018.1_all.deb
root@kali:~# apt install ./kali-archive-keyring_2018.1_all.deb

However, you need to ensure that your Kali Linux Repositories are correct, mine were as follows:

If you want a guide on how to fix you Kali Linux Official Repositories, follow this guide. Follow the Kali Rolling section.

Happy days!