An installation for controlling and monitoring the different coded locks of an assembly embodying: An issuer for elaborating coded keys for controlling said locks and a reader associated with each lock, adapted for unlocking this lock on simple presentation thereto of a correctly coded key, this issuer and this reader being adapted so that detection by said reader of the code y recorded by said issuer on each new key of order p assigned to the lock associated with this reader results in the inva...

When a vehicular electric apparatus, such as an audio apparatus, is switched on, an anti-theft procedure is initiated. The electric apparatus is inhibited from becoming operational if a predetermined code is not input, when the electric apparatus is switched on after it was disconnected from a vehicle battery or after a prescribed period has passed.

A method of access validation whereby a false system becomes bound to an accessing user if an unacceptable accessing pattern is detected. The false system interacts in a mode similar to the conversational protocols of target systems but remains logically insulated from said target systems. Concurrent messages to security monitors at binding time ensure entrapment.

Diodes are used for memorizing an identification number. A microcomputer judges a combination of diodes and decides an identification number corresponding to that combination. The microcomputer is connected directly to a battery. Whether the audio device provided with an antitheft device according to this invention is stolen or not is judged, depending on whether it is connected without interruption to the battery or not. It is judged that the device is stolen, only when the battery has been onc...

A combined immobilizing and steering column control system for a vehicle includes a device, a steering wheel, and a vehicle immobilizing system. The device has a transponder for transmitting an identification signal. The steering wheel includes controls and a first inductor. The first inductor transmits a control signal for controlling a vehicle function in response to a corresponding steering wheel control being actuated. The immobilizing system has a second inductor and a controller. The secon...

A security system, for use with a chassis enclosing electrical circuitry and having a lid movable relative to the chassis to allow access to the electrical circuitry, including: (1) a plurality of switches, couplable to the electrical circuitry, that are configured to store a security code readable by the electrical circuitry and (2) a trip mechanism, coupled to the chassis, that alters the security code stored by the plurality of switches when the lid is moved relative to the chassis, whereby t...

An electronic, push-button, combination door lock or electronic lock system which can only be activated by an individual having knowledge of a predetermined, arbitrary combination. The invention utilizes a series of sequential time-based logic gates to activate the lock system's devices. The system also includes inherent circuitry: (1) which will reset the system to its initial or ground reset state, in the event of a combination error; (2) which will prohibit the combination from activating the...

A system for controlling starting and stopping of an engine that prevents a user from erroneously determining that the system is not functioning properly. The system includes an electronic key that may be inserted in a socket. The key selectively transmits a key ID code and a key transponder code to the vehicle. A microcomputer installed in the vehicle checks whether the key ID code matches a vehicle ID code when the key is arranged in the vehicle and checks whether the key transponder code matc...

A communication device having a theft deterrence feature includes a selective call receiver (16), a transmitter (16), a memory (18) coupled to the selective call receiver and containing an encryption key (40) and an address (41), a secure memory (26) coupled to the selective call receiver containing secure data that is accessible with the encryption key and further containing a stealth code, a tampering detection circuit (21) for detection of unauthorized use by an unauthorized user of the commu...

An interface card includes a housing sized for reception by a host system, for example, a laptop computer. A sensor is movably connected to the housing and has a first position in which the sensor receives a relief object and generates an electronic representation of the relief object, and a second position in which the sensor is inactive. An interface module is coupled to the sensor and configured to provide for communications between the interface card and the host system.