Traceability model based on improved witness mechanism

Traceability system is one of the popular applications graphic blockchains. However, there are centralisation problems and a long time for final consistency confirmation in blockchain. In addition, blockchain traceability application scenario has problem insufficient supervision. Therefore, witness-based consensus mechanism proposed. mechanism, verifiable random function used to screen publishers unit; an SM2 threshold signature sign unit information improve non-repudiation uploaders under supervision witness. The improved algorithm cancels process finding stable main chain makes relatively many nodes participate process. experimental results show that using witness can reduce degree centralisation, shorten new units reach consensus, greatly ensure security scalability system.