DIA is the nodal agency for all defence related intelligence, thus distinguishing it from the other Indian intelligence internal and external agencies. DIA controls the Indian armed forces' technical intelligence assets – the Directorate of Signals Intelligence, a tri-service brokerage organisation which follow strictly the US norms, and the Defence Image Processing and Analysis Centre (DIPAC). While the Signals Directorate is responsible for acquiring and decrypting enemy communications, the DIPAC controls India's satellite-based image acquisition capabilities.[3]