Safety two-direction vector advantage comparison method based on block chain

Abstract

The invention belongs to the field of cryptology and information security, and particularly relates to a security two-direction vector advantage comparison method based on a block chain. According tothe method, block chain and cloud outsourcing calculation is used as a basic framework, a block chain is used as a driving tool to replace a trusted third party to manage and supervise the whole calculation process, and normal operation of a vector is ensured. By means of cloud outsourcing computing, heavy computing tasks are transferred from a user to an outsourcing server with enough computing power, the burden of the user is relieved, and extra computing resources are fully utilized. According to the method, cloud outsourcing calculation and the block chain are combined, a reliable reward punishment mechanism is provided, the attack cost of a malicious server is greatly increased while the calculation overhead of a user is reduced, and therefore a semi-honest model protocol which is seriously limited in actual operation originally is guaranteed.

Description

technical field [0001] The invention belongs to the field of cryptography and information security, and more specifically, relates to a method for comparing the advantages of secure two-way vectors based on blockchain. Background technique [0002] With the rapid development of information technology, the Internet has become more and more important in people's daily life. In recent years, Internet applications and services have sprung up like mushrooms after rain. Although these Internet applications have brought great convenience to people's lives, many applications have also collected a large amount of user data in the process, so this has also aroused people's attention to the leakage of private information. As an effective privacy protection technology, multi-party secure computing is one of the directions that researchers focus on. It focuses on how to use the private information of participants to complete related computing tasks in distributed scenarios. Comparing t...

AI Technical Summary

Problems solved by technology

[0004] Although the above methods can solve the two-way vector comparison problem, they are only applicable to the semi-honest model, that is, participants must perform each step honestly, and cannot resist malicious behavior

At the same time, the method proposed by Atallah uses a trusted third party, which lacks feasibility in practical use

Ibrahim's method lacks the case of equal vector nodes, which may cause user privacy leakage without preprocessing

At the same time, users of the above methods have to do a lot of calculation and communication operations, which brings more overhead to users