| General > General Technical Chat |
| Laser-ing the IC markings off on a budget. |
| << < (8/17) > >> |
| Simon:
You could set the reset pin of the micro controller if there is one to be an IO pin which will disable any ICSP but they can still try high voltage so may as well just lock access to read out the code. |
| Syntax Error:
I suppose the question really is, what is the intellectual property that needs protecting, the hardware or the firmware? Even if the firmware in flash is obscurated or even encrypted, that just makes life more difficult for an attacker, not impossible. That said, an external encrypted EEPROM may be what the OP needs? "Use an External Encrypted EEPROM to Secure Data in Embedded Systems": https://www.digikey.com/en/articles/use-external-encrypted-eeprom--secure-data-embedded-systems |
| Simon:
by the sounds of it the OP needs to deal with some managers that are not very grown up and don't know what they are dealing with or understand the real world. |
| Alex Eisenhut:
In the 1980s hackers were able to break Videocipher by drilling holes into the chip package to probe signals on the die. So if a handful of pre-internet hackers were able to outwit a corporation, as an individual or small company, you don't stand a chance. https://www.sun-sentinel.com/news/fl-xpm-1987-01-25-8701050839-story.html |
| Simon:
which is why I say just rub the numbers off with some sandpaper, if that don't stop them nothing will. |
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