Securing the Privacy of Transactions Using Blockchain: Swap Battery Framework for Massive Subsidy Electric Motorcycle in Jakarta

The ecosystem of electric vehicles is developing very rapidly in Indonesia, especially in Jakarta, with the government's policy support for relatively massive electric vehicle subsidies. Especially with electric motors, the transaction is expected to be large, such as battery replacement infrastructure and digital payments, compared to other after-sales services. The payment process uses a third party as a payment gateway, information can be shared between parties because it applies a centralized architecture to its system. However, centralized payment processes have concerns about user privacy and the exploitation of payment data. This can be used by data thieves who hack centralized data and sell the data on the black market. This study aims to propose a decentralized battery replacement transaction framework using blockchain. Utilizing interconnected blocks and cryptography, this scheme can ensure data authenticity and guarantee user anonymity in payments. The address wallet is used as an anonymous entity for each person without revealing the owner's personal data. This system can handle payments without the involvement of other parties, such as payment gateways that require sharing user information.