Annotation Sharing in Encrypted E-Books via Position Calculation
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Solution Overview
Problem
Electronic books with encrypted text data pose challenges for annotation sharing due to inaccessible text data, making it difficult to specify positions within the content for copyright and security reasons.
Innovation Solution
An annotation sharing method and apparatus that calculates and stores the position of annotations within electronic book content using related information, allowing for annotation sharing without directly accessing the text data, utilizing a system with an annotation adding unit, position calculation unit, and storing unit to associate annotations with their positions in a database.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If text data is encrypted for copyright protection and security reasons, then security and copyright protection are improved, but the ability to specify positions within the content for annotation sharing deteriorates
Solution Approach 1:
The patent introduces an intermediary metadata structure that acts as a bridge between the encrypted text data and the annotation system. This metadata contains position information (such as chapter, section, paragraph identifiers) that can be accessed without decrypting the actual text, enabling annotation positioning while maintaining security. The metadata serves as a mediator that provides necessary positioning information without exposing the protected text content.
2Reliability
If direct access to text data is prevented for security reasons, then security is improved, but the ability to share annotations with precise positioning deteriorates
Solution Approach 1:
The patent segments the content structure into multiple hierarchical levels (such as book, chapter, section, paragraph, sentence) and associates position information at each level with the encrypted text data. This segmentation allows the system to store and retrieve annotation positions using metadata identifiers rather than direct text access, maintaining security while preserving precise positioning information for annotation sharing.
3Reliability
If text data is made inaccessible to protect copyright, then copyright protection is improved, but the functionality of annotation sharing deteriorates
Solution Approach 1:
The patent creates a universal metadata structure that serves multiple functions: it enables position specification for annotations, provides navigation capabilities, and maintains copyright protection. This multi-functional metadata system allows the same structure to support various operations (annotation, navigation, search) without requiring direct text access, thereby improving adaptability while maintaining copyright protection.
Data Source
AI summary
According to an embodiment, an annotation sharing method includes outputting a content; acquiring an annotation positioned in the content; calculating a position of the annotation in the content using information, that is related to the content and is usable for specifying the position of the annotation in the content, without using a body of the content; and storing the calculated position and the annotation in association with each other and in a readable manner.