Encrypted Job Log Search via Dual-Key Segmentation
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Solution Overview
Problem
Existing image processing systems fail to securely manage and search job log records containing classified information on cloud servers, as they decrypt customer data during search operations, compromising privacy.
Innovation Solution
An image processing system that employs dual encryption keys for attribute and image data, allowing job log records to be encrypted and searched on a cloud server using attributes and character strings within images, maintaining data confidentiality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If data is decrypted on the cloud using a key saved on the cloud to enable search operations, then search functionality is improved, but privacy and security of classified information deteriorates
Solution Approach 1:
The patent segments the data into two parts: encrypted job log records (containing classified information) and encrypted search indexes (containing only searchable attributes). This segmentation allows search operations to be performed on the index without decrypting the actual classified data, thus maintaining security while enabling search functionality.
Solution Approach 2:
The patent introduces an encrypted search index as an intermediary between the search query and the encrypted job log records. The index contains encrypted attributes that can be searched without exposing the underlying classified information, acting as a mediator that enables search while preserving privacy.
2Reliability
If job log records are encrypted before saving to the cloud to enhance security, then privacy protection is improved, but search capability deteriorates
Solution Approach 1:
The patent segments the job log record into searchable attributes (stored in an encrypted index) and classified content (stored in encrypted job log records). This allows the system to maintain encryption for security while providing search capability through the separate index structure.
Solution Approach 2:
The patent creates a copy of the searchable attributes from the job log record and stores them in a separate encrypted index. This copy enables search operations without requiring access to or decryption of the original classified information in the job log records.
3Adaptability or versatility
If character recognition processing is performed on encrypted image data, then full-text search capability is improved, but processing complexity increases
Solution Approach 1:
The patent performs character recognition processing on image data before encryption, extracting text content in advance. This preliminary action allows the extracted text to be stored in the encrypted search index, enabling full-text search without needing to perform complex OCR operations on encrypted data later.
Data Source
AI summary
The present invention enables job log records concerning an image processing apparatus to be managed in such a manner that the job log records can be searched on a server such as a cloud server using attributes and a character string included in an image as the job log records remain encrypted, thereby solving a problem concerning privacy.