关键词: 简短可链接环签名, 智能合约, 电子选举, 匿名地址, 星际文件系统

Abstract: At present, using linkable ring signatures or one-time ring signatures, some electronic election protocols protect the privacy of voters, and prevent voting repeatedly. However, the size of the signature increases with the number of voters, while the size of the short linkable ring signature remains constant, but existing short linkable ring signatures are inefficient. To solve these problems, using accumulator and signatures based on proofs of knowledge, new efficient short linkable ring signatures are constructed, and combining signatures with the anonymous address and IPFS, a new smart contract election scheme is proposed. The operations of election setup, voting and counting phases are designed respectively. The unforgeability, linkability, anonymity, privacy, public verifiability and operational efficiency of the scheme are proved and analyzed. Finally, an experimental simulation evaluation is carried out, and the results show that with the increase of voters, the signature size and Gas cost of the ballot are less and constant, and the generation time and verification time are less and increase slowly.

Key words: short linkable ring signatures, smart contract, electronic election, stealth address, interplanetary file system