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SMR32 Bootloader and security

Question asked by xol.xol on Sep 29, 2012
Latest reply on Sep 30, 2012 by Clive One
As far as I understand using of the standard ST bootloader is not secure because in this case FW can not be protected and may be read by anyone. I mean anyone can read my FW and theoretically copy it to its own products or dissasemble it and see how it works Is this correct?

If yes the only way to secure FW is to write own bootloader with some kind of encryption. (I did it with AVRs). In this case my question is what are the minimal HW requirements to get access to system memory and fuses. What is the most simple on-board programmer available? What pins should be routed and how? Is where any reference?

I'm a bit confused about 20 pin connector od the J-Link. Why 20 pins?

And the last question. Is system memory accessible or more exactly writable  from regular Flash?