The National Institute of Standards and Technology (NIST) seeks comments on the second draft of NISTIR 7628, Smart Grid Cyber Security Strategy and Requirements. This second draft has been updated to address the comments submitted. In addition, the privacy, vulnerability categories, bottom-up analysis, individual logical interface diagrams, and the cyber security strategy sections have all been updated and expanded and the requirements section has been revised to include requirements for the entire Smart Grid. Finally, there are new sections on research and development, standards assessment, and an overall logical functional architecture. This is the second draft of NISTIR 7628; the final version is scheduled to be posted in the spring of 2010.able>