發送短信 : Nonce-based symmetric encryption

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