nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqpn3082tr4276sm3jq56f5crdcrtxkm805902a7xc7mut2pw4p6lsdz4nyz (nprofile…4nyz) i hope you can deduct the answer from this link https://web.archive.org/web/20161120080823/https://openpgp-conf.org/program.html#stefan
(have to use the archive.org copy, the original is unsafe and inoperational?)
this blogpost is an update to that talk: https://www.ctrlc.hu/~stef/blog/posts/on_pgp.html