This document discusses using an adaptive wideband Delphi method to study the cyber defense requirements of Indonesia. A group of experts in four panels (government officials, academics, industry, and practitioners) provided feedback in multiple rounds to develop 25 mitigation controls across five categories (people, operations, technology, governance, and legal remedies) to protect against foreign surveillance threats. The Delphi method helped identify key requirements and classify them to help assess security risks and protect national interests.