Book excerpt: Exploring the digital frontiers of feminist international relations, this book investigates how gender can be mainstreamed into discourse about technology and security. With a focus on big data, communications technology, social media, cryptocurrency and decentralized finance, the book explores the ways in which technology presents sites for gender-based violence. Crucially, it examines potential avenues for resistance at these sites, especially regarding the actions of major tech companies, surveillance by repressive governments and attempts to use the Global South as a laboratory for new interventions. The book draws valuable insights that will be essential to researchers in international relations, security studies and feminist security studies.