NIST announces the release of Draft Special Publication 800-121 Revision 2, Guide to Bluetooth Security. This draft is the second revision to NIST SP 800-121, Guide to Bluetooth Security. Updates in this revision include an introduction to and discussion of Bluetooth 4.1, and 4.2 security mechanisms and recommendations, including Secure Connections for BR/EDR and low energy. Please submit comments to email@example.com with "Comments on SP 800-121r2" in the subject line. The comment period closes on December 5, 2016.