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Secure Microcontroller usually destroy key material on tamper detection. However, Secure Microcontroller Data Recovery Effect in SRAM and Flash/EEPROM makes secure erasure process more challenging. On the other hand, data integrity of the embedded memory is essential to mitigate fault MCU attacks and Trojan malware. Data retention issues could influence the reliability of embedded systems. Some examples of such issues in industrial and automotive applications are presented.

Secure Microcontroller Data Recovery Effect

When it comes to the security of secure microcontroller, both data remanence and data retention issues could lead to possible data recovery by an IC Breaker. This article introduces a new power glitching technique that reduces the data remanence time in embedded memory from seconds to microseconds at almost no cost. This would definitely help in designing systems with better secret key guarding.

Data recovery in non-volatile memory could be influenced in the same way. The effect of data remanence and data retention on hardware security is discussed and possible countermeasures are suggested. This should raise awareness among the designers of secure embedded systems.