5G networks leverages modern technological paradigm such as software define networking (SDN) and network functions virtualization (NFV) to meet the requirements of broadband access everywhere. SDN and NFV leverages the advances in cloud computing such as mobile edge computing to meet ease of integration requirements. However, securely using these technologies and providing user privacy in future wireless networks are common concerns that are not talked about. Therefore, this talk provides an overview of the security challenges in clouds, software defined networking, and network functions virtualization, and the challenges of user privacy and provide solutions to these challenges and build roadmap for secure 5G systems.