The DUP System

Since version 0.1.0 the DUP System uses ssh for authentication and to encrypt session information exchanged between nodes. As a result, we believe that it is generally safe for users to run DUP. However, DUP does not encrypt the streams of data exchanged between computational stages (since this would be computationally expensive and likely destroy possible performance gains from distributing the computation). If you exchange data between nodes on the Internet using DUP, you should add openssl stages into the DUP flow graph to encrypt data streams at the appropriate locations.