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  ____     \ \\/ //  /  ___||  \ \\/ //  |  _ \\  
 |    \\    \ ` //  | // __     \ ` //   | |_| || 
 | [] ||     | ||   | \\_\ ||    | ||    | .  //  
 |  __//     |_||    \____//     |_||    |_|\_\\  
 |_|`-`      `-`'     `---`      `-`'    `-` --`  
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發送短信 : ID-based Multi-signer Universal Designated Multi-verifier Signature Based on Discrete Logarithm