One day I just got dead tired of that plastic RFID key fob I used to have in my key ring. Every once in a while the plastic broke and I lost the fob. So I ordered an empty rewritable leather key fob from China and decided to make my own copy using my Proxmark3 RFID development board.
The below is just a quick write-up so I don’t forget how I did it.
Verify your Proxmark3
[usb] pm3 --> hw tune Measuring antenna characteristics, please wait...... # LF antenna: 23.79 V @ 125.00 kHz # LF antenna: 30.25 V @ 134.00 kHz # LF optimal: 31.21 V @ 131.87 kHz # HF antenna: 26.91 V @ 13.56 MHz Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.
Clone your tag
Read original tag
[usb] pm3 --> lf search : EM TAG ID: XXXXXXXXXXX (xxxxx_xxx_xxxxxxxx) :
Write to new tag
[usb] pm3 --> lf em 410x_write XXXXXXXXXXX 1 [+] Writing T55x7 tag with UID 0xXXXXXXXXXXX (clock rate: 64) #db# Started writing T55x7 tag ... #db# Clock rate: 64 #db# Tag T55x7 written with 0xXXXXXXXXXXXXXXXXXX
Verify new tag
[usb] pm3 --> lf search : EM TAG ID: XXXXXXXXXXX (xxxxx_xxx_xxxxxxxx) :
You must be logged in to post a comment.