Key agreement for device or user authentication via broadcast channel (BC) measurements of biometric or physical identifiers are considered. An inner bound for the key agreement with privacy and secrecy preservation, a limited amount of database storage, and multiple uses of the same identifier is proposed by combining an output statistics of random binning argument with a reverse Pinsker’s inequality. The proposed inner bound is shown to be tight for a new physically-degraded, two less noisy, and two essentially-less noisy BCs.