Write your own loader in PBP, this link will tell you how. Encrypt the hexfile on the PC-side and let the loader read the data serially or whatever way and at the same time decrypt it and writing the code to the codespace.

This way the hexfile is safe all the way ........ and I trust Microchip's ability to keep the code inside the chip after I have set it to CP. At lest for a reasonable cost and effort :-)


http://www.picbasic.co.uk/forum/showthread.php?t=4498


Maybe it is time to start a real thread with bootloaders in this forum. That link is full with errors and is quite long.... An I2C decryption loader using an external EEprom became 8 kbytes and is working great.

And no, I will not tell you my encryption

/me