Optimisation approaches have shown great success in a variety of domains. Arguably the topic is "security". This talk reprises extant successes in this increasingly important field and outline areas of significant interest that seem little attacked. There is ample opportunity to work across disciplines and the aim of the talk is to stimulate discussion and to inspire such work. The talk will highlight various problems that could act as benchmarks and indicates where some leading edge security work is going. A traditional benefit of invited talks includes the freedom to engage in rank speculation. There will be some!