The name-matching software made by Identity Systems, based in Old Greenwich, Connecticut, is used by more than 200 government agencies around the world.

ECONOMIST: Computing: What's in a name? | The

Though YouTube partnered last January with Audible Magic, a Los-Gatos based company that identifies copyrighted content based on audio matching, that technology was only used to identify content offered by YouTube's music industry partners.

FORBES: YouTube's Filter Fails to Please