Retroshare creates encrypted connections to your friends. Nobody can spy on you. Retroshare is completely decentralized. This means there are no central servers. It is entirely Open-Source and free. There are no costs, no ads and no Terms of Service.
Send text and images. Discuss with various people in chat rooms. Express your emotions with the rich smiley set. Use distant chat to chat securely with friends-of-friends.
* Voice and Video
Make free and secure calls with the VoIP plugin. Catch up face to face with a video call.
Send encrypted messages to other members of the network. Retroshare can store encrypted messages on friends nodes to deliver messages while you're offline.
* File sharing
Share files with your friends or with the whole network. Use the search to find files. Retroshare uses swarming similar to BitTorrent, to accelerate the download. This makes it possible to share big files with 1GB or more. Your privacy is protected with anonymous tunnels. Only your direct friends might learn which files you download.
You can read and write forum posts offline. This is perfect while you are on the go. When you have an Internet connection, Retroshare will automatically synchronize forums with your friends. Decentralized forums are censorship resistant by design.
Share your favorite links. See which links others like. Vote and discuss links.
Publish files in channels. Subscribe to channels and automatically download the latest files. Comment on files and spread them to your friends.
* Hide with Tor
Need to hide from Internet surveillance? Can't connect to your friends because of censorship? Use Retroshare over Tor to hide the connection between you and your friends.
How does it work?
Retroshare is a network of computers. These computers we call nodes and every user has its own node. Neighbors only know the exact location (the IP-address) of nodes. You invite someone to become a neighbor by sending your public key.
Forums use pseudonymous nicknames to identify people. The nickname system uses cryptographic keys to verify messages come from specific authors. The nickname information travels wherever the forum post goes.
If you send a message to a user, the system delivers it to his node by searching for a route by forwarding it via a chain of neighboring nodes. If you want a certain file, your node asks your neighbors and they in turn request it from their neighbors.