As a critical infrastructure element, smart grid requires the highest levels of security. A comprehensive architecture with security built in from the beginning is necessary. The smart grid security solution requires a holistic approach in- cluding PKI technology elements based on industry standards, and trusted computing elements. Clearly, securing the North American power grid will require the use of standards-based state-of-the-art security protocols. PKI technical elements, such as certificate lifecycle management tools, trust anchor security, and attribute certificates, are known technologies that can be tailored specifically to smart grid networks, resulting in an efficient and effective solution. The PKI solution supports the trusted computing elements, including device attestation.