Despite the tempting similarities, the analogy between nuclear and cyber weapons is presently flawed. High-ranking officials that are using it as the basis for policies of deterrence in cyberspace are making a potentially dangerous misjudgment. Given the wide-open future of cyber warfare, it would make sense to expand the analogy to include other revolutionary military technologies to provide the conceptual flexibility necessary to confront the presently unforeseeable challenges that lie ahead in cyberspace.