Publicly shared numerous types of personal data further increase the possibilities for misuses, especially sensitive data, such as health or biometric data. Our focus is on the phenomenon when people publicly share their or others' personal data related to directed blood donation in order to find donors on the Internet without any protection, which can be the source of identity theft or fake fundraising crimes. To solve this problem and help people to protect their data in this relation, we designed and implemented a possible solution called Shesmu DBDsys, which applies AES-256-GCM encryption to protect and QR code to share data. Shesmu does not store any personal data and ensures that potential donors can only access personal information related to the recipient if they perform a successful donation. We also carried out experimental software analyses to validate the correctness of our implementation and to give proposals, such as the appropriate size of the QR code.