US Patent 10255732 Door access control via a mobile device

Devices, systems, and methods for door access control via a mobile device are described herein. One mobile device for providing door access control, includes a processor and memory, coupled to the processor, wherein the memory includes instructions executable by the processor to provide a specific user identity, assigned to the mobile device, and a digital identifier, that is associated with an application stored in memory on the mobile device, to a door access controller, wherein the application includes a locking mechanism for the application that must be renewed at a first particular time period and wherein the mobile device includes a locking mechanism to lock the device after a second particular time period.