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 |__  //   \ \\/ // | || | ||  \ \\/ //  |__  //  
   / //     \ ` //  | '--' ||   \ ` //     / //   
  / //__     | ||   | .--. ||    | ||     / //__  
 /_____||    |_||   |_|| |_||    |_||    /_____|| 
 `-----`     `-`'   `-`  `-`     `-`'    `-----`

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發送短信 : A permissioned blockchain framework for security and privacy-preserving AMI in smart community