With hundreds of millions of people involved in online piracy each month, unauthorized file-sharing costs entertainment industry companies and content owners billions of dollars each year. To address this problem, NBC Universal has patented a system for detecting high-volume peer-to-peer file-sharing activity. Peer-to-peer file sharing can be used for lawful purposes, but it is often an indicator of online piracy. This high-volume file-sharing, called a “swarm,” also puts strain on internet service provider networks. NBC’s new system can detect and target these swarms. The system functions by setting a threshold of data activity. When enough data is being exchanged, an alarm is triggered and high-risk swarms are then tagged. The data collected from swarms can be used to issue “takedown messages” to internet service providers, and to throttle or limit network resources.