FLEXKEY

Blank portable proximity key tag credentials containing programmable hardware which are used to communicate with a host key tag reader of an access control system for security applications, namely, for identification of a key tag holder or for permitting physical entry of a key tag holder to a controlled access location, and encoded portable proximity key tag credentials containing pre-programmed hardware which are used to communicate with a host key tag reader of an access control system for security applications, namely, for identification of a key tag holder or for permitting physical entry of a key tag holder to a controlled access location