Abstract: A lock system comprising an electromechanical lock and code generator, and an electronic code lock, which is connected to a code transportation medium. The electronic lock and code generator is a system, where the code medium includes both a mechanical and an electrical code, which both must be present with the correct code before the code transport transmitter can be activated. The transmission of the code takes place within a short time interval and at an individual transmission rate, and a timed blocking is built-in in case of an incorrect optical code, and a circuit counteracting voltage manipulation is built-in. The code transportation medium is electrical or optical. The electronic code lock is a system, where the correct code must be received twice successively.