NVO3 develops protocols that support network virtualisation and operate over an IP underlay transport network within a data centre environment. Increasing demand from applications for computation, data storage, and network resources requires increased scalability, agility, and flexibility for adding, moving, and connecting services. Network virtualisation responds to this demand. As such, a virtual network must be able to communicate both with other networks. Given the fact that many virtual networks are often hosted in one data centre, a high level of security and privacy is required to prevent the traffic of one network being exposed to another. Data leakage can lead to the exposure of personally identifiable information, which can be used to track users associated with a particular network.