FZ - 125kHz RFID
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Last updated
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For more info about how 125kHz tags work check:
Tries to read the card info. Then it can emulate them.
Note that some intercoms try to protect themselves from key duplication by sending a write command prior to reading. If the write succeeds, that tag is considered fake. When Flipper emulates RFID there is no way for the reader to distinguish it from the original one, so no such problems occur.
You can create fake cards in Flipper Zero indicating the data you manually and then emulate it.
Some times, when you get a card you will find the ID (or part) of it written in the card visible.
EM Marin
For example in this EM-Marin card in the physical card is possible to read the last 3 of 5 bytes in clear. The other 2 can be brute-forced if you cannot read them from the card.
HID
Same happens in this HID card where only 2 out of 3 bytes can be found printed in the card
After copying a card or entering the ID manually it's possible to emulate it with Flipper Zero or write it in a real card.
For more info about these types of tags .
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