A hybrid device includes a plurality of diverse subsystems, including a first and a second subsystem. The first subsystem includes at least one first secured storage device configured to store a first software and a first CPU configured to boot and execute the first software. The second subsystem includes at least one second secured storage device configured to store a second software and a second CPU configured to boot and execute the second software. The first CPU is configured to generate the first hash of the first software and transmit the generated first hash of the first software to the second subsystem. The second CPU is configured to perform a first authenticity validation check on the first software using the received first hash of the first software, and generate an error signal on a condition that the first authenticity validation check on the first software fails.