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M340 firmware encrypted?

Published date: 26 August 2019

The checksum is encrypted. 
It is only embedded in a built application (stu or sta), and not XML export format (zef or xef), so even more difficult to find it. 
M340/Unity has a cryptographic checksum. 
It is important to know that the software/firmware on an M340 Ethernet PLC is approved, tested and validated.
As such, each M340 PLC should have a known configuration of software and firmware.
The transit agency should be able to confirm that files on each PLC have not been tampered with.


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