Concealment Device Segmented Random Numbers for Privacy Accuracy

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Solution Overview

Problem

Existing privacy protection techniques, such as those based on differential privacy and secret sharing, fail to enhance the accuracy of concealed data, making it difficult to perform accurate analysis of usage conditions for home electric appliances in monitoring services.

Innovation Solution

A concealment device that generates and transmits random numbers from seeds, allowing the data analysis device to restore these numbers and approximate the concealed data to its original form stepwisely, thereby improving analysis accuracy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If random numbers are added to conceal data using differential privacy techniques, then privacy protection is improved, but data analysis accuracy deteriorates

Engineering Contradiction:

Improveprivacy protectionVSAvoiddata analysis accuracy

Core Design Contradiction:

ReliabilityVSMeasurement precision

Solution Approach 1:

The patent segments the random numbers into multiple groups corresponding to different privacy levels. Each group can be independently removed or retained based on analysis requirements, allowing progressive disclosure from highly concealed data to partially concealed data with increasing accuracy.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces dynamic control over the concealment level by allowing selective removal of random number groups. The system can transition from a state with all random numbers (high privacy, low accuracy) to states with progressively fewer random numbers (decreasing privacy, increasing accuracy) based on analytical needs.

Inventive Principle:

Principle #15Dynamics

2Reliability

If multiple random numbers are added to enhance privacy protection, then privacy level is improved, but the ability to restore original data deteriorates

Engineering Contradiction:

Improveprivacy levelVSAvoidrestorability of original data

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent divides multiple random numbers into distinct groups that can be selectively managed. This segmentation enables partial restoration by removing specific groups while retaining others, balancing privacy protection with restorability based on analytical requirements.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent performs preliminary organization of random numbers into structured groups before concealment operations. This preliminary structuring enables systematic removal and restoration operations, making the original data recoverable through controlled processes rather than requiring complete knowledge of all random numbers.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS11163895B2Concealment device, data analysis device, and computer readable medium

Publication Date: 2021.11.02 MITSUBISHI ELECTRIC CORP

AI summary

A random-number generation unit generates a plurality of random numbers from a plurality of seeds. A data scrambling unit conceals concealment target data which is a concealment target by using the plurality of random numbers generated by the random-number generation unit. A transmission unit transmits concealed data which is the concealment target data concealed by the data scrambling unit to a data analysis device, and transmits any seed among the plurality of seeds to the data analysis device, after transmission of the concealed data to the data analysis device.