What is Docker? Why is it such a big deal? How does it enable DevOps thinking and practice? What are some of the security concerns and solutions around this amazingly popular new form of system virtualization? The first third of the talk will describe Docker, the history of containers and the differences between containers and VMs. The second third will talk about the potential benefits of Docker in particular and why it is so popular. The emphasis will be on why security minded folks might consider it time well spent for their company to see if Docker makes sense. The third part will highlight the notion of identity management as something completely missing from the Docker paradigm today and what is happening in Docker’s larger ecosystem to address it. Additionally it will demonstrate Docker’s first nod toward security with Notary (https://github.com/docker/notary).