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NIST announces the final release of Special Publication (SP) 800-121 Revision 1, Guide to Bluetooth Security. It describes the security capabilities of technologies based on Bluetooth, which is an open standard for short-range radio frequency communication. The document gives recommendations to organizations employing Bluetooth technologies on securing them effectively. Significant changes from the original SP 800-121 include adding the latest vulnerability mitigation information for Secure Simple Pairing, and introducing and discussing Bluetooth v3.0 + High Speed and Bluetooth v4.0 (Low Energy) security mechanisms and recommendations.