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

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Text this: Blockchain supported security functionality for internet of things (IoT) systems