Countering cyber threats demands cooperation among nations, in particular public-private partnerships. The key is the timely exchange of warnings and follow-up information at the governmental, military, and private levels. Without prompt alerts regarding cyber-attacks or espionage methods and targets, all countries will find it difficult, if not impossible, to detect and prevent attacks. Countries, however, are struggling to identify common ground because they have different interests and concerns, as well as different approaches to privacy and regulations — for reasons ranging from national security to impact on economic growth. Thus, it is better to commence cyber collaboration with allies that share interests, economic models, and threat perceptions.