Schlage’s keyfobs provide the convenience of either contactless smart card technology or proximity technology in a form that can optionally include an iButton credential. This durable combination works well in environments that do not require photo ID badging. The ability to attach the keyfob to a key ring ensures that personnel will be less likely to forget or lose their access credential. The combination of either smart card technology or proximity technology with an iButton provides the ideal dual credential for organizations that have integrated multiple credential technologies into their facilities. The iButton provides a registration number used for access control in legacy systems, and the proximity or smart card technology enables future expansion with more advanced credentials. The proximity keyfob incorporates the convenience of proximity technology with the iButton. The smart keyfob can support diverse applications such as access control, biometrics, cashless vending, transit applications, and many more.