Peer-to-peer communication and file sharing app based on a friend-to-friend network built on GNU Privacy Guard (GPG). Optionally, peers may communicate certificates and IP addresses to and from their friends.
Retroshare
retroshare.ccA targeted-tier tool. Built for a real, capable adversary. Overkill for everyone below. Threat levels
Built on a friend-to-friend model over GPG, which is the key distinction: privacy comes from only connecting to people you’ve explicitly trusted, not from anonymizing among strangers. That makes it strong for a known circle and weak as soon as you want to reach beyond it. Choose it for a closed group that wants encrypted chat and file sharing without a central server. It’s the wrong shape if you need broad, anonymous reach.
Measures the security configuration of the tool's own website, not the privacy of the product itself. A strong tool can still score low here.
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