Operation Eikonal is a collaboration between the National Security Agency (NSA) and Bundesnachrichtendienst (BND) for the sharing of telephony and Internet data captured in Germany. It is based on an agreement that dates to 2002, and is part of the NSA operation "RAMPART-A". Surveillance started in 2003, telephony data was collected from 2004 onwards, and all Internet traffic from the Deutsche Telekom (DT) switching center in Frankfurt was captured starting in 2005.