A Survey on Privacy Preserving Voting Scheme Based on Blockchain Technology

The blockchain methodology utilizes cryptographic hashes to establish end-to-end demonstration to facilitate security for votes. The aim of the project is to establish a successful voting methodology with the help of blockchain mechanism. With this mechanism, every vote is reserved as a new block and gets updated in the database. The system assures that voting system maintains the one person, one-vote (democracy) principle. This is accomplished by matching the voter's unique face biometric at the start of each voting attempt to avoid double voting. In this, we have created an online voting system through blockchain methodology which is used to solve the issues that are faced by the pre-developed methodology. For each unique vote, different enactment is done. Miners will reject a vote if it is suspected as being malicious. Blockchain mechanism used here makes the vote trustworthy and reliable, and it will also aid to raise the number of voters besides it enhances trust toward the government. In this project, we apply the hash function using SHA—256 algorithms for secure password hashing. It is necessary to have unique hash for every vote that is being recorded by cryptographic hash by which each vote can be verified distinctly. This characteristic facilitates the general voting process’s verifiability. In addition to this, the vote that is being counted is more secure and not an individual including the operator knows about the details of the vote that is being recorded.