Top 2 hydrabus-board open source projects

HydraNFC is an open source NFC (13.56MHz) Shield hardware for researcher, hackers, students, embedded software developers or anyone interested in debugging/hacking/developing/penetration testing NFC hardware.

The RHme2 (Riscure Hack me 2) is a low level hardware CTF challenge that comes in the form of an Arduino Nano board. The new edition provides a completely different set of new challenges to test your skills in side channel, fault injection, cryptoanalysis and software exploitation attacks.