ABSTRACT
All modern intelligence services engage in transnational cooperation. This is not completely new; in the eighteenth century there were regular cryptanalytic exchanges between the British and Hanoverian Black Chambers. Military alliances in the first half of the twentieth century encouraged intelligence exchanges, culminating in the pooling of British and American material on the enemy in the Second World War. Yet the idea of formal agreements and wholesale peacetime interchanges is a relatively recent one, a product of the Cold War. Here I discuss Norway's participation in the patchwork of bilateral and multilateral intelligence cooperation that developed inside and outside NATO. For the details I draw on Olav Riste's and Arnfinn Moland's officially commissioned account of the Norwegian Intelligence Service between 1945 and 1970, published at official request in 1997. 2
