US 8,432,300 B2 · Keypad membrane security

Abstract

In an exemplary embodiment, a security sensor is present in a POS terminal between the keypad and a processor. The security sensor is configured to detect an unauthorized probe through the keypad and implement a security protocol. In an exemplary embodiment, the security sensor is a serpentine conductive circuit screen printed on the polyester film. The serpentine conductive circuit may cover almost all of the polyester film. For example, the serpentine conductive circuit may cover 90% to 100% of the film. Furthermore, in an exemplary embodiment, the serpentine conductive circuit limited to a section of the polyester film. For example, the serpentine conductive circuit may be on only ¼ of the film. This embodiment has the advantage of printing the serpentine conductive circuit on the critical security areas and leaving the non-critical areas with blank polyester film.

Claims15

Dependent claims

A point-of-sale device comprising:

a rubber keypad;
a printed circuit board (PCB) configured to at least one of store or access transaction data;
a secure membrane located between the rubber keypad and the printed circuit board, the secure membrane being configured to detect an interruption in a conductive circuit of the secure membrane;
at least one switch contact connected to the PCB;
a spacer layer connected to the PCB on a first side and to the secure membrane on a second side, the spacer layer comprising a via;
and
a switch shorting bar attached to the secure membrane adjacent the PCB, the switch shorting bar being spaced apart from the at least one switch contact.

4 more elements

Dependencies are inferred from the claim text.

Keypad membrane security

Life of this patent

Keypad membrane security

Life of this patent

Abstract

Claims15