System for signaling a device at a remote location

A system for enabling protected two-way communication between a control station and at least one remotely located module, and for initiating on/off control of an end user apparatus at the location of the module, said system having communication capability with a communications host which may be linked with a satellite, said system comprising:

• a shareable control station having a database and including electronics to send/receive information to/from a communications host, said communications host performing two-way communication with said end user apparatus;
• at least one remotely located electrically powered module associated with a known end user and having an assigned unique identification number (ID), said module being mounted in said end user apparatus which is in the form of a vehicle which is to be selectively protected, tracked, and controlled by an on/off switch, said module including:
• a circuit which generates a changing password which changes at predetermined time intervals, the combination of the unique identification number and the password providing a time-varying security code which is encrypted prior to transmitting and decrypted after receiving, the security code identifying the module;
• and
• electronics to send a park status signal from the module to the shareable control station;
• said shareable control station having circuitry to read said time-varying security code and said park status signal and for remotely incapacitating the vehicle by turning off a power supply thereto by a control signal from the control station through the protection module responsive to the vehicle being sensed to be in a parked condition.

The system for enabling protected two-way communication between a control database and at least one remotely located module, said system having communication capability with a communications host which may be linked with a satellite, said system comprising:

• a shareable control station having a database and including electronics to send/receive information to/from a communications host and to encrypt/decrypt information while communicating with said communications host;
• at least one remotely located module which has an assigned unique identification number (ID) and is able to send/receive information to/trom said communications host;
• circuitry in said control station to read and identify said unique identification number (ID) of said at least one module before accepting information from said module;
• and
• electronics in said module using a time varying algorithm to generate a changing password which changes at a controllable time interval, for enhancing security in communication with said at least one module;
• said electronic having a circuit to resynchronize the module ID at power restoration after a power loss to the module;
• said module selectively including:
• a sensor to sense a physical condition parameter of said remotely located module to generate a signal to be sent to said control station;
• and
• means to selectively encrypt/decrypt information which is sent out from/received by said at least one module, while communicating with said control station.