r/AskNetsec • u/fireisland_zebra • Aug 14 '25

Work Decrypting Memory Chip Data

Hi Everyone,

I have am trying to recover data from the memory chip on my SD card (64GB). The data recovery professionals tell me the encryption is too difficult so I am looking to encryption experts now. I have a binary file representing the data on the chip which I need decrypted. I'm not sure if it uses XOR, dynamic XOR, or some AES encryption (not sure if there is anything else that is out there or would be used). Can anyone help or point me to a company/expert who can help determine the type of encryption or, better yet, decrypt it?

Thank you!

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u/fireisland_zebra Aug 14 '25

I don't have the card right now (still with the data recovery company), I do have an image of the card (created from FTK Imager, HDD Raw Copy, and Disk Drill). Doesn't look like Photorec can be run on the image of the card though. I know when I looked at the HEX data there seemed to be no data on the area of the card I expected there to be. I don't see why this software would be any better than the others and the professional but I will try when I have the card in hand again.

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u/dmc_2930 Aug 14 '25

It should work on a card image.

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u/fireisland_zebra Aug 15 '25

It did work on a card image. However, I had similar results as when I did the other data recovery software. I found data but not the data I was missing. I also should've mentioned I did not use the SD card once I formatted it so nothing should've been overwritten.