In the tread
Mikeharrison spoke of a nice hack for securing an eeprom/AVR, but this makes me wonder about a few things.
'modify' the hardware of the AVR, so even if the hex file is extracted, it won't run on a new chip. The modification is to deliberately wear out one or more eeprom locations with huge numbers of read/write cycles. it worked OK on the old 9346 eeproms.
The questions that come to mind are:
1. Is this possible with the embedded AVR Flashrom
2. Can we control what bits get stuck?, something like a serial number by writing the same number again and again?, or does the Flashrom only degrade during 0-1 or 1-0 transisions.
3. How reliable will the bits hang?
4. How could we utilize this technique to the fullest, embed the "Serial" in the code?, use some kind of self modyfing code that uses the Serial?