Read-back feature on a DE10-Nano?

Hi,

I will recommend you to enable the encryption which your bitstream will be encrypted. Other user will be able to read the bitstream but will not able to use it without the key.

Please refer to https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/an/an556.pdf for more information on the type of encryption enabled.