The operation and control of the current power grid depends on a complex network of computers, software, and communication technologies that, if compromised by hackers, could be used to cause great damage, including extended power outages and destruction of electrical equipment. Therefore, known vulnerabilities in these systems must be mitigated in order to increase the security and success of the Smart Grid. Advanced Metering Infrastructure (AMI) offers a more sophisticated two way communication system that collects measure and analyzes energy usage, from network-connected devices such as electricity meters, gas meters, and/or water meters. But all these devices are susceptible to hackers. This article highlights what is needed to secure a smart grid.