On: GnuPG can now be used to perform notarial acts in ...

[arianvanp]

There is OpenBSDs signify which is used for their packaging: https://www.openbsd.org/papers/bsdcan-signify.html

https://man.openbsd.org/signify.1

There's also a NIH version of this that I and a friend put together: https://github.com/ruuda/tako

[lfam → arianvanp]

This is a port of OpenBSD's code:

https://github.com/aperezdc/signify/