Secured keypad for an electronic data-entry device

A keypad for an electronic data-entry device, said keypad comprising:

• a plurality of keys defining a layer of keys;
• a connection printed-circuit board for said keypad, comprising a key-press detection portion, said key-press detection portion comprising an external face oriented towards said layer of keys and an internal face opposite said external face;
• for each key of said layer of keys, an interconnection element and at least one pair of contacts on said connection printed-circuit board, said interconnection element arranged to make electrical connection of the contacts of said pair of contacts when a pressure is exerted on the associated key of said keypad, said interconnection element comprising a deformable dome disposed between said internal face of the key-press detection portion and a counter-pressure element, a base of said deformable dome being oriented towards said internal face;
• wherein said connection printed-circuit board is a flexible printed-circuit board further comprising a connecting portion, said connecting portion forming a fold beneath the internal face of said key-press detection portion;
• and
• wherein said at least one pair of contacts is disposed on the internal face of said key-press detection portion.