gnunet-gtk binary package in Ubuntu Bionic s390x

 GNUnet is a framework for secure peer-to-peer networking that does not use any
 centralized or otherwise trusted services. Its high-level goal is to provide a
 strong free software foundation for a global network that provides security
 and in particular respects privacy.
 .
 GNUnet started with an idea for anonymous censorship-resistant file-sharing,
 but has grown to incorporate other applications as well as many generic
 building blocks for secure networking applications. In particular, GNUnet now
 includes the GNU Name System, a privacy-preserving, decentralized public key
 infrastructure.
 .
 This package contains the graphical client, using the GTK+ toolkit. In order
 use GNUnet, you also need gnunet either on your server or on your local
 machine.

Source package