How To Program Kyber Crystals With A Proxmark3

This video demonstrates how to reprogram the RFID chip inside a kyber crystal using a Proxmark3.

The EM4305 RFID tag inside a kyber crystal stores data in several different 8-byte blocks called "words" located at different "addresses". The value stored at address 6 controls how the crystal is seen by holocrons and lightsabers. Changing this value allows you to change the crystal.

The address 6 values for all known kyber crystals can be found under the "Crystals by RFID, Tag and Color" tab on this spreadsheet: https://docs.google.com/spreadsheets/...

The command to reprogram this crystal back to a teal crystal:
lf em 4x05writeword a 6 d [address 6 value] p 0

The syntax for this command may be different for your version of the Proxmark3 client. Please refer to your client's documentation for the correct syntax.

The kyber crystal used in this video is a custom teal crystal from Jando's Shop on Etsy. https://www.etsy.com/shop/jandno.