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RFID Cloning and SDR Radio Analysis

School - ESGI M1 SI Team of three October 2025 Completed

Exam done as a team of three, combining two physical/radio security disciplines: cloning an RFID/NFC Mifare Classic card, and analyzing a radio signal via SDR (Software Defined Radio). Done together with two classmates, Nagib and Ismael.

Two chains: RFID cloning and SDR capture RFID chain Mifare card classic RFID reader Proxmark / mfoc .mfd dump clone SDR chain Antenna 433-920 MHz HackRF / RTL-SDR reception GNU Radio demodulation
Two independent chains covered during the exam: cloning a Mifare Classic card, and capturing/demodulating a radio signal with GNU Radio Companion.

Context

Practical exam from the M1 Information Security curriculum, covering the security of short- and long-range radio technologies. Done as a team of three, with each member contributing to both parts of the exercise.

What was built

  • Cloning of a Mifare Classic card: full dump in .mfd format, compatible with Proxmark and mfoc tooling.
  • A GNU Radio Companion flowgraph built for capturing and demodulating a radio signal on the 433-920 MHz band.
  • SDR hardware (HackRF, RTL-SDR) used for signal reception.
  • A structured submission documenting the methodology for each part of the exercise.

Tech stack

GNU Radio Companion HackRF RTL-SDR Mifare Classic Proxmark

Status

Exam completed and submitted. These radio skills were reinvested in the annual project on receiving satellite signals via SDR, see the Satellite signal reception via SDR page.

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