GXUbase16

This algorithm just for some shower heater for GuangXi some tow one one, some Dormitory area, if this not work, emmmm. I am already forget the encryption principle, I wrote this codes many years ago, if you want to challenge yourself, you can read it, it's not too long.

get data:

1. download trnas.cpp

2. g++ -fexec-charset=GBK trans.cpp -o trans.exe && trans.exe

   21

   340800000000000000000000000000003C

hack step:

1. make sure that your Android device can use NFC and install MIFARE Classic Tool

2. use your phone swipe your campus card and tap "write tags"

3. sector: 12

   block:1

   data:340800000000000000000000000000003C

   write block

   sector: 12

   block:2

   data:340800000000000000000000000000003C

   write block

4. enjoy your shower time.