發送短信 : Enforcing access control over data streams

 _____      _____     ______     ___      ______  
|  __ \\   |  ___||  /_   _//   / _ \\   /_   _// 
| |  \ ||  | ||__    `-| |,-   / //\ \\  `-| |,-  
| |__/ ||  | ||__      | ||   |  ___  ||   | ||   
|_____//   |_____||    |_||   |_||  |_||   |_||   
 -----`    `-----`     `-`'   `-`   `-`    `-`'