DIGITAL IMMUNE SYSTEM for cyberspace is planned to work as shown here. An unknown virus spurs a client machine to forward a sample to an administrative machine (1), which in turn sends an encrypted sample to a central virus-analysis machine (2). This machine replicates the virus in a "petri dish" device and analyzes its behavior and structure (3). The resulting prescription is sent back to the administrative machine (4), which forwards it first to the infected client (5) and then to other machines on the local network (6). Subscribers around the world receive regular antivirus updates that protect them from the new virus (7).