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The National Institute of Standards and Technology (NIST) seeks comments on draft NISTIR 7628 Rev. 1, Guidelines for Smart Grid Cyber Security. Draft NISTIR 7628 Rev. 1 was completed by the NIST-led Smart Grid Cybersecurity Committee (formerly the Cyber Security Working Group) of the Smart Grid Interoperability Panel. The document has been updated to address changes in technologies and implementations since the release of NISTIR 7628 in September 2010. In addition, the document development strategy, cryptography and key management, privacy, vulnerability classes, research and development topics, standards review, and key power system use cases have been updated and expanded to reflect changes in the Smart Grid environment since 2010. The final version is expected to be posted in the fall of 2013.