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

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Text this: Formal verification of security protocols