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Provider:

CAPTCHA:

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

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Text this: A scalable signature scheme for video authentication