Scrambled Text Indexing for Secure Digital Content Distribution
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Solution Overview
Problem
Existing digital content distribution systems struggle to balance security and accessibility, as they often require users to download and store content, which can be easily copied or forwarded, and are not easily indexable by search engines, limiting revenue opportunities for content providers.
Innovation Solution
A content distribution system that scrambles text content to create an indexable version for search engines while maintaining security, allowing users to access encrypted content through a metrics server and viewer applet, which decrypts the content for viewing while preventing unauthorized copying or forwarding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If content is placed behind a firewall for security, then unauthorized copying is prevented, but search engines cannot index the content
Solution Approach 1:
The patent segments the content delivery system into two distinct paths: one for search engines (providing scrambled but indexable text) and one for authorized users (providing secure encrypted content). This segmentation allows each path to be optimized for its specific purpose while maintaining overall system security and accessibility.
Solution Approach 2:
The patent introduces a scrambling mechanism as an intermediary between the original content and search engines. The scrambled text serves as a mediator that preserves keyword searchability while preventing direct reading, thus bridging the gap between security requirements and search engine accessibility.
2Ease of operation
If content is downloaded to conventional browsers for viewing, then users can access the content, but the content can be printed or forwarded to unauthorized users
Solution Approach 1:
The patent changes the state of the content from plain text to scrambled text based on the requester type. By detecting whether the request comes from a search engine or a conventional browser, the system dynamically changes the content parameter (scrambled vs. unscrambled) to achieve different security and accessibility outcomes.
3Reliability
If encrypted content is delivered to protect during transmission, then security is improved, but the content cannot be easily cataloged and indexed
Solution Approach 1:
Instead of encrypting the content and then trying to make it indexable, the patent inverts the approach by first scrambling the content to maintain indexability, then delivering it in a form that becomes secure upon receipt. The scrambling is applied in reverse logic: making content appear unreadable while preserving its searchability through keyword retention.
Data Source
AI summary
In a secure content distribution system, the text is extracted and scrambled in content documents that include text. The scrambled content is made available for indexing by conventional search engines but is not available as plain text and thus is kept secure. The scrambling process breaks a text stream derived from the content document into two to five word phrases, randomizes the phrases and creates a text file from the randomized stream. Third party search engines are allowed to index the scrambled file so that search algorithms that search on particular words or phrases produce nearly the same number of hits as with the plain text file. A web server that provides the content returns either the scrambled content to a search engine or a link to the publisher by examining a user agent parameter that accompanies a content request. Alternatively the scrambled content also includes a script routine that links to the publisher.