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I am working on lattice MachxO2 FPGA. Our customer is asking to to encrypt the JDEC file (the bit file). How do I do this?
There is sample Unencrypted JDEC file and some information given here from p.no 35 onward, but it does not mention of encrypting the same.
The Lattice Diamond 2.1 help for bitgen on command line says this is only available for LatticeECP2S and LatticeXP2 devices. Look for bitgen -e -k and -s options. Maybe running these options on MachXO2 device works...
From the product info it would appear that encryption is not supported. You can lock the device against readback, though.
