proxmark3 VS libnfc

I would check out the Proxmark3 Github repo [0]. They have a cheatsheet [1] with the basics on how to get started. I also did a talk about RFID security last year about the basics [2]

To get started, the basics are: low freq (LF) is usually around 125khz and is rarely encrypted (HID Prox is the most common in the US). The data is often encoded in Wiegand format for access control systems (something to keep in mind when reading the raw data).

High freq (HF) (aka NFC) is ~13Mhz and is readable by most Android phones with NFC. Not all tag data can be read however. HF cards support a lot of different options including data storage (normally in a block layout with permissions to read and write depending on keys) and encryption (iCLASS and SEOS being the HID offerings and very common). Some can be cloned (like hotel cards) while others (like SEOS) require a downgrade attack to work correctly (SEOS -> normal SEOS reader -> Weigand data -> older style card like HID Prox).

[0] https://github.com/RfidResearchGroup/proxmark3

[1] https://github.com/RfidResearchGroup/proxmark3/blob/master/d...

[2] https://www.youtube.com/watch?v=zKOAywZqisc

🔗 https://github.com/RfidResearchGroup/proxmark3/releases/tag/v4.17140

After pulling and compiling a newer proxmark3 generic firmware from the RfidResearchGroup repo I got farther but now have a new message I've not found much about with static nonces. https://github.com/RfidResearchGroup/proxmark3/

you could use linux (ubuntu) https://github.com/RfidResearchGroup/proxmark3/blob/master/doc/md/Installation_Instructions/Linux-Installation-Instructions.md

You will have to do the leg word, but this is a starting point: https://github.com/RfidResearchGroup/proxmark3/blob/master/client/luascripts/hf_mf_sim_hid.lua

Grab yourself a Proxmark3, read the instructions here, and you can extract your iClass elite key in a few seconds. You can pick up a PM3 easy for a few bucks.

I cloned whatever the latest commit was at https://github.com/RfidResearchGroup/proxmark3, which is what the guide on dangerous things suggests (where I bought my PM).

#Setup the build tools sudo apt-get install build-essential gcc make autoconf libtool automake pkg-config libusb-1.0-0-dev libusb-dev #Pull down the libnfc source mkdir tools cd tools git clone https://github.com/nfc-tools/libnfc.git cd libnfc #Configure and build the tool autoreconf -vis ./configure make && sudo make install #Test: nfc-list

Have you gotten libnfc(https://github.com/nfc-tools/libnfc) installed? it has nfc-emulate-forum-tag2 and nfc-emulate-forum-tag4

If you want to script up a little code, there is a pretty rich ecosystem of libnfc compatible readers. With these, you could start with something simple like reading a unique card ID off of each card, then doing some kind of logic or database lookup to get the status, from which you drive a GPIO or output to drive your light.

If you install libnfc, it includes examples (https://github.com/nfc-tools/libnfc/tree/master/examples)