Issuing vouchers is a means of implementing social welfare. There are some security concerns about paper-based vouchers, such as counterfeiting, reproducing, their low operating efficiency and so on. This study explores how to apply blockchain technology and cryptography to build a secure e-voucher system in order to solve various shortcomings of paper vouchers. A feasible application model is proposed that integrates blockchain technology in the context of vouchers to support the field of social welfare. In this study, we conducted an analysis to prove that the security requirements of the e-voucher system are met when applying this model. Subsequently, we used the Hyperledger Fabric blockchain platform and Kafka ordering services to implement the campus welfare meal voucher system. A large number of experimental data were obtained to show that the system has a satisfactory performance. In the conclusion section, we discussed the theoretical and management implications of this study, and how this study meets UN Sustainable Development Goals.Sustainability 2020, 12, 3362 2 of 22 stores then ask the government or non-profit organizations for money with the voucher received. Government or non-profit organizations may use cash vouchers to reach consumption incentives or public welfare. In Zambia, poverty is a challenge that this country has always faced. Since agriculture is the main economic body, the Zambian government launched the Farmer Input Support Program (FISP) to subsidize farmers' crop losses due to natural disasters. The government issued a physical pre-paid voucher card to the farmer, and the farmer can use the card to redeem agricultural input supply. Zambia expects farmers who have been subsidized for two years to leave the plan, but the government has no way to track who has reached the subsidy deadline, thus the cost of FISP has exploded. Later, Zambia decided to build an electronic voucher system to try to solve some problems [8,9]. However, the Zambian government still faced some problems, which we will discuss later in the next section.Since a voucher is equivalent to proof of cash value and is not redeemable for cash, the anti-counterfeiting of vouchers is a very important issue. Because vouchers have a welfare purpose, only eligible individuals can receive and use vouchers. Therefore, preventing the transfer of vouchers is also a very important issue. Moreover, the relevant parties involved in the e-voucher system are more diverse than those involved in the general admission system, so mutual trust between groups is a key factor in the success of the e-voucher system. Recently, an emerging technology, called blockchain, has brought many new opportunities to the industry. Blockchain technology achieves trust among parties and fault tolerance through cryptography and decentralized architecture. The blockchain has evolved over several stages since its introduction. Virtual currency is the earliest application of blockchain technology. Gradually, it has been found that the special features of blockc...