Improved Multisignature Scheme for Authenticity of Digital Document in Digital Forensics Using Edward-Curve Digital Signature Algorithm

<table class="algorithm-group"><tr><td><table class="algorithm" id="alg2"><tr><td> </td><td>Input: Document, Private Keys of all signatories</td></tr><tr><td> </td><td>Result: Digital Signature</td></tr><tr><td> </td><td>Notations;</td></tr><tr><td> </td><td>EdDSApriv ← EdDSA private-key</td></tr><tr><td> </td><td>EdDSAPrive ← EdDSA combined private-key</td></tr><tr><td> </td><td>Doc ← File to be signed</td></tr><tr><td> </td><td>EdDSASignature ← EdDSA Signature</td></tr><tr><td> </td><td>Initialization;</td></tr><tr><td> </td><td>EdDSApriv1 ▷Private key of user 1</td></tr><tr><td> </td><td>EdDSApriv2 ▷Private key of user 2.</td></tr><tr><td> </td><td>.</td></tr><tr><td> </td><td>.</td></tr><tr><td> </td><td>EdDSAprivn ▷Private key of user n.</td></tr><tr><td> </td><td>EdDSAPrive = EdDSApriv1<svg height="7.30254pt" id="M22" style="vertical-align:-0.04981995pt" version="1.1" viewbox="-0.0498162 -7.25272 7.75925 7.30254" width="7.75925pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M574 0L325 548H263L14 0H76L293 479H295L512 0H574Z"></path></g></svg>EdDSApriv2…<svg height="7.30254pt" id="M23" style="vertical-align:-0.04981995pt" version="1.1" viewbox="-0.0498162 -7.25272 7.75925 7.30254" width="7.75925pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M574 0L325 548H263L14 0H76L293 479H295L512 0H574Z"></path></g></svg>EdDSAprivn</td></tr><tr><td> </td><td>Digital Signing;</td></tr><tr><td> </td><td>EdDSASign = Sig (Doc, EdDSAPrive)</td></tr><tr><td> </td><td>Print EdDSASig</td></tr></table></td></tr></table>

Security and Communication Networks

alg2

Algorithm 2

Algorithm 2: Improved Multisignature Scheme for Authenticity of Digital Document in Digital Forensics Using Edward-Curve Digital Signature Algorithm 