發送短信 : Privacypreserving anonymization of set-valued data

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