Secure Multi-Party Data Processing With Bandwidth-Controlled Iterations

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Solution Overview

Problem

Existing multi-party joint data processing methods face high bandwidth consumption and inefficiency while requiring stringent privacy and security measures, especially in high-density data processing scenarios.

Innovation Solution

A bandwidth-controlled multi-party joint data processing method and apparatus that utilizes secure multi-party computation (MPC) to determine shared identifiers and random arrays based on initial seeds, allowing participants to reuse confidential data within iterations without direct exchange, thereby reducing bandwidth and enhancing processing efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If service data are directly exchanged between multiple participants for joint processing, then processing completeness is improved, but bandwidth consumption increases and privacy security deteriorates

Engineering Contradiction:

Improvejoint data processing efficiencyVSAvoidbandwidth consumption

Core Design Contradiction:

ProductivityVSLoss of energy

Solution Approach 1:

The patent segments service data into feature data and identifiers, where only identifiers and processed feature data are exchanged between participants. This segmentation allows joint processing to proceed without transmitting complete raw service data, thereby reducing bandwidth consumption while maintaining processing efficiency.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces a trusted third party or secure multi-party computation protocol as an intermediary that enables joint processing without direct data exchange. This intermediary mechanism processes data through cryptographic operations and secure protocols, eliminating the need for participants to directly transmit sensitive service data over the network.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If service data are directly exchanged between multiple participants for joint processing, then processing completeness is improved, but data privacy security deteriorates

Engineering Contradiction:

Improvejoint data processing efficiencyVSAvoiddata privacy security

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent employs secure multi-party computation protocols and trusted intermediaries that enable joint processing while maintaining cryptographic security. These intermediary mechanisms ensure that no participant can directly access or infer other participants' service data, preserving privacy security while enabling collaborative processing.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent uses cryptographic copies and representations of data (such as encrypted feature data and hashed identifiers) instead of transmitting original service data. These cryptographic copies maintain the necessary processing capabilities while preventing direct access to sensitive information, thus preserving data privacy.

Inventive Principle:

Principle #26Copying

3Measurement precision

If confidential data are exchanged in each iteration of joint processing, then processing accuracy is improved, but bandwidth consumption increases

Engineering Contradiction:

Improveprocessing accuracyVSAvoidbandwidth consumption

Core Design Contradiction:

Measurement precisionVSLoss of energy

Solution Approach 1:

The patent performs preliminary processing of service data into feature data and identifiers before the iterative joint processing begins. This preliminary action prepares data in a format that maintains processing accuracy requirements while minimizing the data volume that needs to be exchanged during subsequent iterations, thereby reducing bandwidth consumption.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent discards redundant or non-essential data elements during the iterative processing, keeping only the necessary feature data and identifiers for maintaining processing accuracy. This selective discarding reduces the amount of data that needs to be exchanged in each iteration while preserving the essential information needed for accurate results.

Inventive Principle:

Principle #34Discarding and recovering

Data Source

PatentUS12574356B2Bandwidth controlled multi-party joint data processing methods and apparatuses

Publication Date: 2026.03.10 ALIPAY (HANGZHOU) INFORMATION TECH CO LTD

AI summary

Bandwidth-controlled, private, multi-party joint data processing is described. When performing an nth iteration of joint data processing on service data, multiple participants separately determine a same nth identifier at the current iteration and includes sub-identifiers separately corresponding to service data of the multiple participants. The multiple participants are enabled to separately determine their respective random arrays in a predetermined trusted interaction manner and based on the nth identifier and initial seeds of the multiple participants. When a first sub-identifier exists in a correspondence between sub-identifiers and confidential data, the multiple participants separately obtain first confidential data corresponding to the first sub-identifier and perform the current iteration of joint data processing with another participant using secure multi-party computation (MPC) based on exchange of other confidential data and respective first confidential data. The first confidential data is obtained by fusing first service data and a corresponding first random number.