AbstractThe military now views cyberspace as a new warfare domain, with constant cyber operations potentially causing significant consequences. Internationally, countries are heavily involved in cyberspace, but international law lags behind this evolution, raising questions about its application and retaliation measures. This article investigates international law in cyberspace and cyber operations in warfare and terrorism, exploring recent calls for increased legislation. The impact of cyberspace nonregulation on international security is examined from both positive and negative perspectives. It argues that solving anonymity and attribution issues requires state collaboration, with an initial step of cooperation against cyber‐terrorism. The conclusion emphasizes the necessity of cyberspace regulation and legislation for international and national security, offering a starting point for discussion.