Approaches to the Implementation of Data Storage Functions for the Blockchain Platforms Hyperledger Fabric and Waves Enterprise

The paper discusses methods for implementing data storage functions for private blockchain systems Hyperledger Fabric and Waves Enterprise. Since private blockchain platforms such as Hyperledger Fabric and Waves Enterprise do not contain internal cryptocurrency, they are primarily focused on creating office management systems. In this case, the question of storing personal data often arises, because. Essentially, the blockchain platform is open. To mask information, techniques such as homomorphic encryption, zero-knowledge proof (ZK-SNARK), special hardware add-ons, and much more are used. The paper discusses the vulnerabilities and shortcomings of existing blockchain technology solutions. The authors proposed algorithms for smart contracts that allow solving problems of storing personal data.