Among other things, a system comprises a processor device, a memory in communication with the processor device, and a storage device that stores a program of computing instructions for execution by the processor using the memory. The program comprises instructions configured to cause the processor to receive from a user device biometric information of a user requesting access to the security system. The biometric information is associated with the user in possession of the user device. The processor is also caused to analyze the received biometric information to determine whether the user in possession of the device is a person authorized to access the security system with the user device. If the user is determined to be authorized, the user is allowed to access the security system.