To install the AIMS PPA public key on your machine, run the following command:

wget https://ppa.aims.ac.za/apt-public-keys/aims-desktop-ppa.gpg -O /etc/apt/trusted.gpg.d/aims-desktop-ppa.gpg

SHA256 checksums:
e89f580327a11a59329ed20b8c459eb3659184371cad447a64e0bfd900b54cfc  aims-desktop-ppa.gpg
1efeba9893fc048e59c7bcfa8d57b43aeb5da03f0797b864667ced986f2b5f7f  aims-desktop-ppa.gpg.txt