The signature can be verified using LEAP’s archive signing key. You can browse the downloads, including release candidates.
If you want to try the latest code, you can download the latest bundle that is built automatically for every change.
sudo apt install leap-archive-keyring
sudo sh -c 'echo "deb http://deb.leap.se/client release stretch" > /etc/apt/sources.list.d/bitmask.list'
sudo apt update && sudo apt install bitmask
Change stretch for zesty or buster, according to your distro. Read more about our different repositories for deb packages.
If none of the above methods works for you, you can try to install via pip or from source, or get in contact with us if you want to package Bitmask for some other distribution.