Abstract: An example mobile device location assertion verification method includes: obtaining, at an apparatus, an assertion of a first mobile device being at a first location at a first time; obtaining, at the apparatus, first indications of a radio frequency environment corresponding to the first mobile device, the first location, and the first time; obtaining, at the apparatus, second indications of a second radio frequency environment corresponding to a second mobile device, a second location, and a second time; correlating, at the apparatus, the first indications and the second indications; and performing an action at the apparatus in response to the correlating.

Abstract: An alarm system monitors a home, business, or other property for fire, burglary, break-in, or other event that may warrant raising an alarm. The alarm system is configured to detect tampering, whereby someone intentionally impedes the ability of the system to raise an alarm or otherwise interferes the system's operation. An alarm panel of the alarm system communicates with a server. At certain times, the alarm system transmits a series of packets to the server using a unidirectional protocol. Upon receipt of one of the packets, the server alternates between monitoring for an incoming packet and ignoring any incoming packets. Detection of an incoming packet during a monitoring time period causes the server to transition to ignoring packets for a sleep period of time. Completion of the sleep period of time causes the server to return to monitoring for the monitoring period of time.

Abstract: An alarm system monitors a home, business, or other property for fire, burglary, break-in, or other event that may warrant raising an alarm. The alarm system is configured to detect tampering, whereby someone intentionally impedes the ability of the system to raise an alarm or otherwise interferes the system's operation. An alarm panel of the alarm system communicates with a server. At certain times, the alarm system transmits a series of packets to the server using a unidirectional protocol. Upon receipt of one of the packets, the server alternates between monitoring for an incoming packet and ignoring any incoming packets. Detection of an incoming packet during a monitoring time period causes the server to transition to ignoring packets for a sleep period of time. Completion of the sleep period of time causes the server to return to monitoring for the monitoring period of time.