Secure handsfree proximity-based access control

Secure handsfree proximity-based access control is provided by a system that includes one or more system devices located near different secured resources. Each system device may broadcast a changing unique identifier to user devices in wireless range of the system device. The system may also include an application that runs on each user device, and that obtains a signal strength measurement in response to receiving or detecting a current identifier advertised from a system device. The application may request access to a secured resource over one or more available wireless networks in response to satisfying the signal strength threshold. The system may include an access control unit that authorizes access to the secured resource based on the earliest arriving request, and further based on an identifier of the request matching to the current identifier, and the current identifier not having been previously used to obtain access to the secured resource.