For Samsung MicroSD cards, Samsung has a tool you can download that authenticates the card. I don't know the specifics of what the tool does, but presumably wit

For Samsung MicroSD cards, Samsung has a tool you can download that authenticates the card. I don't know the specifics of what the tool does, but presumably with proper use of cryptography techniques, it could be made nearly impossible to circumvent. A caveat - I used the tool and it said the card was genuine. Afterwards I put it back in my dashcam, and the dashcam said the card was bad. I just had to reformat it in the dashcam and then it was fine.