發送短信

數:

提供者:

CAPTCHA:

  ______     ___     __   __   _    _    __   __  
 /_   _//   / _ \\   \ \\/ // | || | ||  \ \\/ // 
   | ||    / //\ \\   \   //  | || | ||   \   //  
  _| ||   |  ___  ||  / . \\  | \\_/ ||   / . \\  
 /__//    |_||  |_|| /_//\_\\  \____//   /_//\_\\ 
 `--`     `-`   `-`  `-`  --`   `---`    `-`  --`

Please enter what you see:

發送短信 : An ultralightweight RFID authentication protocol with CRC and permutation