Private clouds are much more than just a public cloud behind a firewall. Private clouds reach into the enterprise and have deep integration with key shared infrastructure that is external to the cloud such as LDAP, Storage, VLANs, DNS, NTP, etc. Furthermore, private clouds have a different threat profile. Users may be from the same organization, but insider attacks and targeted external attacks motivate unique security solutions. This talk begins with a look at the different threats between public and private clouds, both technical and human. Then we will explore how these differences motivate different security solutions for private cloud deployments. This talk will cover both high level concepts and technical details, providing useful information for anyone interested in private cloud security.