If the bootloader is capable of addressing bytes to change a field update can be applied without sending the entire object code. And of course somewhere in the process part of the 128bit # gets changed so the password will be different for each subsequent update. KF4HAZ - Lonnie ----- From: "Wouter van Ooijen" > How about one that must see a 128 bit number within the first > > Sorry, I should have been more specific: I have never seen a bootloading > scheme that can safely (= without relealing the (new) code) work in the > client's context. Whether that is still relevant to the discussion is to > be determined :) > > Wouter van Ooijen > > -- ------------------------------------------- > Van Ooijen Technische Informatica: www.voti.nl > consultancy, development, PICmicro products > docent Hogeschool van Utrecht: www.voti.nl/hvu _______________________________________________ http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist