Data Protection and Firmware Security

Data integrity and firmware security are central to the reliable operation of the CPKM3000 meter. The following subsections describe how energy data is securely stored, how firmware is managed, and how physical tampering is prevented

Energy Data Storage

Energy consumption data is securely stored in the embedded STM32G4xx microcontroller. The microcontroller does not expose any direct access points for retrieving or modifying this data externally.

Firmware Security

Firmware updates are performed through the CAN bus interface. The meter uses a secure boot mechanism to authenticate updates, ensuring that only signed and authorized firmware can be installed.

Tamper Protection

To safeguard against unauthorized access or tampering, the meter is equipped with tamper-proof labels located in two specific areas. These labels provide a visual indication if the device has been opened or altered.