We use this technique in our team to distribute passphrases for our secondary secret stores (that contain instructions on how to access our primary secret store

We use this technique in our team to distribute passphrases for our secondary secret stores (that contain instructions on how to access our primary secret stores) in a "democratically secure and safe" manner. https://packages.debian.org/trixie/ssss https://packages.debian.org/trixie/ssss is a nice and rather straightforward implementation.