Registration and Login Scheme of Charity Blood Donation System Based on Blockchain Zero-Knowledge Proof

With the development of Internet technology, Internet technology provides a platform for charity to allow people to participate together. Currently, each charitable blood donation registration agency operates independently, donors need to fill in personal information multiple times to register and log in when they want to register with different institutions. The information is collected by various platforms, which increases the risk of personal information leakage. In order to protect the security of the personal information used by the user during registration, and relieve the user from the many troubles caused by the leakage of personal information. This article proposes a user registration and login method based on blockchain technology, through the construction of a alliance chain, the blockchain technology is integrated with the registration and login system. To ensure that the user’s information is kept confidential to the charity blood donation platform and use the mobile phone number to register in the alliance chain under the premise of hiding the user’s login application record, successful registration can log in to all platforms on the alliance chain. The alliance chain system issues unique identification numbers to the charitable blood donation platform nodes in the chain, and users use their accounts to post transactions to apply for login nodes, and generate zero-knowledge range proofs to hide login records during the application login process.