Abstract: The invention relates to an electronically tested high-security coder/decoder device, comprising a key (1) consisting of a mechanically produced code, a body with integrated interpretation and actuation unit (2) and an electronic processing device (3) connected thereto. The key (1) has at least one pressure generator and pressure sensor unit (12) with code producing pressure elements (121, 122, 12n) and with one pressure transmitting part each. The interpretation and actuation unit (2) is provided with a unit (22) that converts pressure values known as such to electrical signals, an authorization unit (23) and an exe (24). The conversion unit (22) has an input (221) and an output (22). The output (22) is connected to the input (311) of the central processing unit (31). The central processing unit (31) and the interface (32) cooperate to give the electronic processing unit (3).