This program list expired APT keys without use apt-key which is deprecated.
You can install it simply running these commands on your computer:
wget --no-check-certificate -O /usr/local/sbin/apt-list-expired-keys https://github.com/algodelinux/apt-list-expired-keys/raw/master/apt-list-expired-keys
chmod 755 /usr/local/sbin/apt-list-expired-keys
- Esteban M. Navas Martín algodelinux@gmail.com