Template:Infobox Software Entropy is a decentralized, peer-to-peer communication network designed to be resistant to censorship, much like Freenet. Entropy is an anonymous data store written in the C programming language. It pools the contributed bandwidth and storage space of member computers to allow users to anonymously publish or retrieve information of all kinds. The name "Entropy" is a backronym for "Emerging Network To Reduce Orwellian Potency Yield," referring to George Orwell's famous novel Nineteen Eighty-Four and its totalitarian Thought Police enslaving people by controlling their information.
Entropy is designed to be compatible with the similar Freenet system. As such, any Freenet client can be configured to run on the Entropy network. However, currently Entropy and Freenet data stores are not compatible with each other and therefore do not share data.
Entropy also features a news interface, for reading and posting on the latest frost message boards from within the client.
On July 9, 2004, the creator of Entropy announced that he had stopped work on the project amid uncertainty about the security of the included algorithms, namely the McEliece cryptosystem.