cryptage eeprom

[RAYMON]

Hello

This is an electronic circuit of a base pic 16F876 and I looking for information
and understand how to have protected EEPROM?
is it possible to protect against the reading for the pics?
this example and decryption I put on the site is to give an idea.

http://www.picbasic.co.uk/forum/show...ighlight=ascii

[jonas2]

At the first start-up, you generate a table of random byte in Flash. And you do a XOR between the data write (read) and the table. You can complicate making an XOR between the EEPROM and the address table