Rascals are always sociable, and the chief sign that a man has any nobility in his character is the little pleasure he takes in others company. Arthur Schopenhauer

Ready to pwn your MIFARE tags

RFID is an abbreviation for Radio Frequency Identification. It’s a technology that uses electromagnetic fields to transmit data that a receiver catches from an RFID tag. It is mostly one-way: tag -> reader. The reader is also referred to as interrogator.

A tag at least consists of a chip or circuit and an antenna. There are active, passive and semi-passive tags, where the active version has it’s own power-source (so this adds to the components), the passive one is completely powered by the reader and the semi-passive one has a powered chip or circuit, but data transmission is powered by the reader. Tags can be read-only or read-writable.

RFID can operate on a variety of frequencies, like low-frequency (LF), high-frequency (HF), ultra-high-frequency (UHF), microwave etc., ranging from 120 kHz upto 24,125 GHz. The used frequency as well as the type of tag play a role when it comes to the range a tag can be read from. We are talking about 10 cm - 200 m. gaylord M FOCker - ready to pwn your MIFARE tags