GNUnet is a peer-to-peer framework with focus on providing
security. All peer-to-peer messages in the network are confidential
and authenticated. The framework provides a transport abstraction
layer and can currently encapsulate the network traffic in UDP
(IPv4 and IPv6), TCP (IPv4 and IPv6), HTTP, or SMTP messages.
GNUnet supports accounting to provide contributing nodes with
better service. The primary service build on top of the framework
is anonymous file sharing.
Read more https://packetstormsecurity.com/files/167988/gnunet-0.17.3.tar.gz