Paper about "remote capabilities in microkernels" (with wireguard)

Dear Genodians,

A year or two ago I found an interesting publication about remote capitiblities or capabilities over network. The only things I remember about this paper are that the Genode Microkernel framework and the wireguard component was used to provide a cryptographically secure way of receiving a remote capability. It was more or less 5 pages long.

I’d say I remember @nfeske and @ssumpf where the authors, though I can not say for sure. Sadly I can not find the publication linked here, but I think it should be added to this site:
* Genode - Publications related to Genode

Could you please provide any help and link or DOI the publication?
I searched for many evening and could not find it anywhere again.

Thank you.