Security Protocol for Device-Free Motion Tracking

An approach to authentication, provisioning, and/or access control makes use of a user performing prescribed motion of their body and/or particular limbs (e.g., a prescribed number of steps in one or more directions), for example, as part of a challenge-response protocol. The motion may be detected using the radio frequency reflection techniques. Applications of this approach may include provisioning of equipment that monitors motion within an environment. In some examples, the environment is defined as part of the user performing the prescribed motion (e.g., the user walks around a boundary of their house).