Safety reinforcement device of a corresponding capacitive keyboard and terminal

摘要

Security reinforcement device of a capacitive keyboard of an electronic payment terminal comprising at least one key management processor of said capacitive keyboard, - said security reinforcement device being able to communicate with said processor, - comprising said safety reinforcement device a pilot module (10) of at least one simulation element (S) of at least one key press on said capacitive keyboard, - said pilot module comprising receiving means (101) of at least one simulation command (Cmd1) randomly transmitted by said processor, - implementing said simulation element (S) at least one capacity (CP1) of a predetermined value, called parasitic capacity, - firing said pilot module the action of said parasitic capacity (CP1) by closing at least one switch, said parasitic capacity joining (CP1), when said interr uptor is closed, to at least one receiving electrode (Y1) attached to at least one key of said capacitive keyboard, and - said pilot module being able to pilot at least two parasitic capacities (CP1, CP2), triggering the performance of said at least two parasitic capacities (CP1, CP2) by closing at least one switch, upon receipt of at least two different simulation commands (Cmd1, Cmd2) originating in said processor, joining each of said parasitic capacities, when said at least one switch is closed, to a different receiving electrode (Y1, Y2) that allows the simulation of at least all the numerical keys of said capacitive keyboard.