When talking about cloud it’s easy to fallback to that old joke that cloud is just someone else’s computer. Unfortunately it’s also easy to see it as Someone Else’s Problem (SEP). Ford Prefect, from The Hitchhiker's Guide to the Galaxy, said “An SEP is something we can't see, or don't see, or our brain doesn't let us see, because we think that it's somebody else's problem.” In this session we examine what that means in the cloud and how we can avoid assuming our security is good enough.