Hi. For the past few days I've been looking around for cons and pros for encrypting the AVR firmware with AES, XTEA, XOR etc. Seems like everyone agrees there's little to no point in that since megas can have their lock fuses reset for few hundred $. So, I'm quite likely missing something here, but is it possible to simply implement check in bootloader which reads lock bits and if they're reset simply flash entire chip with 0xFF? Auto-destruct if you will.
Joined: Wed. Sep 3, 2014
Posts: 94 View posts