On July 11, the National Institute of Standards and Technology released a proposed update to its guidelines for securing mobile devices. Originally published as Guidelines on Cell Phone and PDA Security, the proposed Guidelines for Managing and Securing Mobile Devices in the Enterprise offer new recommendations for devices used by the federal government. The draft guideline provide recommendations for developing centralized device management systems, with specific guidance related to (i) developing system threat models, (ii) establishing mobile device security policies, and (iii) implementing and testing prototype mobile device solutions, among other topics.