Cooperative secret sharing method, device and system based on vacant transmission algorithm, and medium

Abstract

The invention relates to the technical field of distributed computing, in particular to a cooperative secret sharing method, device and system based on a vacant transmission algorithm, and a medium. The method comprises the following steps that: S1: a first communication party and a second communication party respectively obtain a first secret component and a second secret component which are subjected to multiplication decomposition, and select common parameters; S2, the second communication party performs calculation based on an SM2 algorithm to obtain a confusion factor set, and sends the confusion factor set to the first communication party; S3, the first communication party calculates random parameters and an encryption result set and sends the random parameters and the encryption result set to the second communication party, and the first communication party calculates to obtain a first decomposition component of additive decomposition; and S4, the second communication party calculates a sharing parameter set according to the random parameters and the encryption result set, and calculates to obtain a second decomposition component of additive decomposition. According to the method, the vacant transmission algorithm is adopted, safe two-party calculation is efficiently achieved under the condition that a safe channel is not needed, and conversion and calculation of the shared secret data are achieved.

Description

technical field [0001] The present invention relates to the technical field of distributed computing, and more specifically, relates to a collaborative secret sharing method, device, system, and medium based on the dazed transmission algorithm. Background technique [0002] Secure Multi-Party Computation (Secure Multi-Party Computation, SMC) is to solve the collaborative computing problem of privacy protection among a group of distrusting parties. SMC must ensure the independence of input, the correctness of calculation, decentralization and other characteristics. At the same time, each input value is not disclosed to other members involved in the calculation. [0003] It is mainly aimed at the problem of how to safely calculate an agreed function in the absence of a trusted third party, and at the same time requires that each participant cannot obtain any input information from other entities except for the calculation results. Secure multi-party computing plays an importa...

AI Technical Summary

Problems solved by technology

Another form of the OT protocol is that the sender S sends two messages m1 and m2, and the receiver R can get one of the messages m1 or m2, but cannot get the other unselected message, and the sender S cannot know the received Which message was chosen by R

However, OT protocols generally have the problems of large amount of computation and low execution efficiency.

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