In recent years, generative artificial intelligence has gained traction, resulting in incredibly realistic synthetic multimedia content that can disseminate misinformation and mislead society. Deepfakes pose serious national security vulnerabilities since they enable sophisticated disinformation operations, foreign meddling, financial crime, and the erosion of faith in institutions. Deepfake detection and legal prosecution became an important agenda for contemporary nation-states. However, serious consequences of deepfakes for national security are still are not properly realized by legislative and regulatory establishment even in the countries of Five Eyes Alliance, known for its advanced cybersecurity awareness and policies. With this in mind, the article makes an attempt of integrating technological and legal domains of combating deepfake technology usage which causes serious consequences, within a single analytical model. Based on a combination of descriptive and exploratory research design, involving comprehensive literature review and semi-structured interviews with the experts across the fields of cybersecurity, machine learning, digital forensics, law, and ethics in the countries of Five Eyes Alliance (sample size 12 participants), the article outlines current landscape of deepfakes creation and detection technologies, as well as institutional awareness and legislative environment in the field of deepfakes law prosecution. The findings allowed making conclusion about scattered landscape of deepfakes identification and, at the same time, the evident lack of legal instruments to prevent deepfakes danger for national security even in the most developed countries, recently especially concerned with national security issues. The integration of findings allowed summarizing the essence of deepfakes serious consequences and developing integrative analytical model, based on Agile Security paradigm, implying predictive analysis of deepfake technology evolutive implications and options of appropriate criminal liability. The novelty of study lies in ‘organic’ combining of technological and legal planes of combating security danger of deepfakes, and the suggested integrative analytical model, based on Agile Security paradigm can become a starting point for further studies and developments in the field.