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

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發送短信 : Implementing security for internet of things (IoT)