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Although HID technical support would never acknowledge this, the HID master authentication key standard security can be overwritten using a special configuration card.
I believe that this feature is used by HID during the last stage of manufacturing where they need to install the "official" Master keys. All of their readers are manufactured in the Phillipines and I would assume that they have the manufacturer build, test, and deliver the hardware using a "Dummy" or "default" set of keys so as to discourage counterfeit products from being built and sold overseas.
The "true" master keys are only installed by HID personnel here in the USA just prior to delivery to their authorized distributors. If you reverse engineer the PIC 18F code in any RevA iclass readers you will find a bit password that is needed to overwrite the Master authentication key.
This password is used in a configuration card that overwrites the Master authentication key. It is NOT used in a configuration card that installs a high security Elite authentication key. To my knowledge, HID does not distribute this "special" configuration card to anyone.
It can however be created yourself using a little knowledge obtained through reverse engineering the iclass reader code.
I have successfully demonstrated overwriting the standard security master authentication key on several iclass readers including the R10,R40 and R90 using this configuration card method so I know it is possible. You can also replace the standard master authentication key by modifying the EEPROM and Flash code in the reader if you know the proper memory locations to change. Last edited by carl55 Offline.
HID iCLASS SE R90 Long Range Card Reader (940NTNTEK00000) - Black
HID iCLASS SE R90 Long Range Reader, 940NTNTEK0000
HID iClass R90 Long Range Reader 6150
R90 ICLS SE,WIEG,TERM,BLK,ELITE KY,HF STD/SIO/SEOS