Wrenna has had an eclectic education and career history before joining the CDT, from teaching in schools to microprocessor architecture documentation. Her background is originally in mathematics, with a BA from the University of Cambridge and a research MSc from the University of Bristol focusing on the properties of the torsion points of elliptic curves. She is interested in all areas of cyber security, but is particularly excited to learn more about cryptography and the geopolitics of cyber security.