What I am looking to do is to “clone” the proximity fob from my 2015 GM car to a smaller backup fob or card. Putting my fob on my PM3 Easy and doing an “auto” command found “Valid Hitag” and the 4-hex-byte UID for it.
Can someone here tell me how to actually implement a clone, and to what medium (chipset) I’d need to use?
The paper you are referring to used a hitag emulator to pretend to be the chip that they were “cloning”.
You can program a new hitag transponder, and some programmers will even work from a dump of a working key. Hitag programmers seem to vary in cost from ~$60 to ~$1,000.
Most locksmiths will clone a key for less than the cost of a programmer. The chip itself is harder to buy singly but I did find some for sale for about $25.
None of these solutions are implantable. I don’t know if they could be made implantable.
theyre for writing fresh data onto, for adding into a system not for cloning other data onto, its a crypto chip and not as simple as other forms of LF.
it has challenge-response and therefore cannot be simply written to a t5577. you need the afformentioned HITAG encoder and blank chips.
~“…have a way to bypass the HiTag chip to start my vehicle”
I had the same setup, looked at that document and went to the RFID Discord for help.
…
I put enough time into it, to realise I should look at alternatives.
The second ones would be a good option if you wanted to add an xAC into the system
Scan - { xAC powers Bypass } - Turn non chipped key or press Push to start etc
into the system