How to prevent tampering in a mobile cryptographic device?

The most common approach is that, once manipulation is detected, all confidential data on the device are erased. From the perspective of developing a mobile cryptographic device, it is advisable to implement all four anti-tampering techniques.

What is anti tampering protection?

Protection against physical manipulation, or anti-tampering protection, is necessary for secure hardware . There are four levels of anti-tampering protection: tamper resistance, tamper evidence, tamper detection and tamper response.

What is a tamper protection device?

The patent “Tamper protection device for protecting a field device against tampering” describes a method of protection against manipulation using distributed memory. Tamper detection refers to checking memory integrity by continuously writing new values and checking the previously written ones.

What is tamper proof?

Tamper evidence or tamper-proof is the ability of a device to retain evidence of tampering for a more extended time period.

How does a patent protect against reverse engineering?

The patent includes multiple protections for proprietary information but concentrates on protection against reverse engineering. The protection is performed by making it difficult to reverse-engineer the connection scheme of the conductive network by making it difficult to detect the lines recorded by the X-ray device.

How does a tamper detection circuit work?

A sensing circuit is connected to the lines to detect a change in path impedance and signal a tamper event warning. On the protected device, several sensors can be connected to one circuit for detection via the sensor selector. Each conductive connection has its specific resistance, stored in the device’s memory.