Mathematical Foundations of Computer Security

Method for hiding private data in the blockchain tender system

D. O. Kondyrev<sup>abc

a</sup> Novosibirsk State University
^b Sobolev Institute of Mathematics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk
^c JetBrains Research

Abstract: A new method has been proposed to solve the problem of information privacy in open blockchain systems using the zk-SNARK cryptographic zero-knowledge proof protocol. The proposed method has been implemented as a cryptographic scheme based on the libsnark library. To integrate the cryptographic scheme into the system, the Ethereum C++ client has been modified, where new functions and an interface for working with them in the form of precompiled contracts has been added.

Keywords: tenders, distributed systems, blockchain, zero-knowledge proof, zk-SNARK, Ethereum platform.

UDC: 004.75

DOI: 10.17223/2226308X/13/26