Tamper-protected hardware and method for using same
One of the various aspects of the invention is related to suggesting various techniques for improving the tamper-resistibility of hardware. The tamper-resistant hardware may be advantageously used in a transaction system that provides the off-line transaction protocol. Amongst these techniques for improving the tamper-resistibility are trusted bootstrapping by means of secure software entity modules, a new use of hardware providing a Physical Unclonable Function, and the use of a configuration fingerprint of a FPGA used within the tamper-resistant hardware.
1. A method for manufacturing a tamper-protected semiconductor module comprising steps:
providing a hardware module comprising one or more emitters for emitting a predetermined excitation that can be measured as a physical measurand, and one or more sensors for sensing the back-scatter of the excitation in form of the physical measurand in a contactless and/or contact-based manner, and housing the hardware module in a cocoon to obtain the tamper-protected semiconductor module, wherein the cocoon influences the back-scatter of the excitation sensed by the sensors in a way unique to the tamper-protected semiconductor module.
2. The method according to claim 1 , wherein the step housing comprises:
enclosing the hardware module in a potting material, and encapsulating the hardware module enclosed by the potting material with a shielding to prevent interference with the predetermined excitation from the outside of the tamper-protected semiconductor module.
3. The method according to claim 2 , further comprising the step of producing the shielding is using one or more of the following technical processes for producing different layers of shielding material on the inside and/or outside of the cocoon surface:
sintering one or more shielding materials,
sputtering one or more shielding materials, —spraying, spritzing or bubbling one or more shielding materials,
coating and/or plating one or more shielding materials,
immersing in one or more baths of fluids comprising the shielding material,
evaporating one or more shielding materials,
electroless plating one or more shielding materials, and
electrolysis using one or more same shielding materials.
4. The method according to claim 1 , performing a thermal treatment of the shielding.
5. The method according to claim 1 , wherein the potting material comprises conductive material or a conduction material mixture that is influencing the back-scatter of the excitation to be sensed by the sensors provided on the hardware module, and the method further comprises the step of providing a passivation to the hardware module.
6. A tamper-protected semiconductor module manufactured by a method comprising steps:
providing a hardware module comprising one or more emitters for emitting a predetermined excitation that can be measured as a physical measurand, and one or more sensors for sensing the back-scatter of the excitation in form of the physical measurand in a contactless and/or contact-based manner, and
housing the hardware module in a cocoon to obtain the tamper-protected semiconductor module, wherein the cocoon influences the back-scatter of the excitation sensed by the sensors in a way unique to the tamper-protected semiconductor module.