on apt-get update I get a gpg BADSIG ED444FF07D8D0BF6 error:

W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://security.kali.org kali/updates Release: The following signatures were invalid: BADSIG ED444FF07D8D0BF6 Kali Linux Repository [email protected]

W: Failed to fetch http://security.kali.org/kali-security/dists/kali/updates/Release

W: Some index files failed to download. They have been ignored, or old ones used instead.

I did aptitude clean and reinstalled kali-archive-keyring, still same problem.

Additionaly this raises two issues:

• I can not download the kali archive keyring via secured protocol.

root@kali:~# wget -q -O - https://archive.kali.org/archive-key.asc | gpg --import
gpg: no valid OpenPGP data found.
gpg: Total number processed: 0

• I can not find the archive key fingerprint published on the kali website, so I can not check keys with
  apt-key fingerprint