A method, comprising: receiving at a television receiver a command to access a listing stored at the television receiver that contains an identifier for each transponder detected by the television receiver, wherein the list includes at least two transponder identifiers and a signal strength associated with each of the at least two transponder identifiers; querying based on the command a memory location of the television receiver that is associated with the listing, to obtain each transponder identifier and associated signal strength within the listing; queuing a secure message that includes a representation of each transponder identifier and associated signal strength within the listing for transmission over a network interface of the television receiver to a computing system that is configured to estimate geographic location of the television receiver based on each transponder identifier and associated signal strength within the listing; transmitting the secure message over the network interface of the television receiver to the computing system; determining by the television receiver that transmission of the secure message to the computing system was unsuccessful; retransmitting the message over the network interface in response to passage of a first predetermined time period (dT) following the determination of unsuccessful transmission of the message to the computing system; and, disabling by the television receiver a smartcard of the television receiver following passage of a second predetermined time period to disrupt processing of television programming for output by the television receiver. receiving at a television receiver a command to access a listing stored at the television receiver that contains an identifier for each transponder detected by the television receiver, wherein the list includes at least two transponder identifiers and a signal strength associated with each of the at least two transponder identifiers; querying based on the command a memory location of the television receiver that is associated with the listing, to obtain each transponder identifier and associated signal strength within the listing; queuing a secure message that includes a representation of each transponder identifier and associated signal strength within the listing for transmission over a network interface of the television receiver to a computing system that is configured to estimate geographic location of the television receiver based on each transponder identifier and associated signal strength within the listing; transmitting the secure message over the network interface of the television receiver to the computing system; determining by the television receiver that transmission of the secure message to the computing system was unsuccessful; retransmitting the message over the network interface in response to passage of a first predetermined time period (dT) following the determination of unsuccessful transmission of the message to the computing system; and, disabling by the television receiver a smartcard of the television receiver following passage of a second predetermined time period to disrupt processing of television programming for output by the television receiver.