The access code protege and advantages of the deprotection associated

摘要

The protection uses master and slave devices. When the correct code is supplied (E1), the master device can be accessed. The first user code is then delivered (E2) to the slave device which is enabled if the user code is equal to the slave access code. The user can the enter (E3) a second user code, which replaces the stored slave code. The master access code is then stored (E4) by the slave.