GNUnet is an anonymous, distributed, reputation-based network. A first service implemented on top of the networking layer allows censorship- resistant file-sharing. Our goal is to provide an infrastructure for secure networking. All communication in GNUnet is authenticated and encrypted. The reputation model makes attacks on the network harder. GNUnet does not rely on any centralized services. While our goals are similar to projects like Freenet, Gnutella, MojoNation and others, we hope to provide a superior combination of features for users that value security more than efficiency. WWW: http://gnunet.org/