Content Log Analysis for Unauthorized Access Detection
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Solution Overview
Problem
Current content distribution systems struggle to detect and prevent unauthorized devices from frequently accessing high-value content, potentially to break copyright protection within home networks.
Innovation Solution
A content distributing system that includes a transmission device, a routing device, and an analyzing device, which generates and logs communication information based on content properties, allowing the analyzing device to identify and judge unauthorized devices by tracking the frequency of content access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If content is distributed freely within home network, then ease of operation is improved, but copyright protection deteriorates
Solution Approach 1:
The system implements feedback by having the analyzing device continuously monitor content access logs and provide information back to the transmission device. When a reception device exceeds the predetermined access threshold, the system detects this through log analysis and responds by prohibiting further content transmission, thus maintaining copyright protection while allowing normal access within limits.
Solution Approach 2:
The system performs preliminary action by setting a predetermined number of times threshold in advance before any copyright infringement occurs. This threshold is established beforehand as a control parameter, allowing the system to prevent potential copyright violations proactively rather than reacting after infringement has already happened.
2Reliability
If access frequency monitoring is implemented, then copyright protection is improved, but device complexity increases
Solution Approach 1:
The system extracts the complex monitoring and analysis functions from the transmission device and routing device, placing them in a separate analyzing device. This separation allows the main content distribution system to remain relatively simple while the specialized analyzing device handles the complex log monitoring, threshold comparison, and unauthorized device detection tasks.
Solution Approach 2:
The routing device serves as an intermediary that generates content access logs based on actual transmission activities. This intermediary component simplifies the architecture by having dedicated devices perform specific functions: the routing device records logs, the analyzing device monitors and analyzes these logs, and the transmission device executes content distribution based on analysis results.
3Measurement precision
If log information is recorded for all content, then measurement precision is improved, but loss of information increases
Solution Approach 1:
The system applies local quality by differentiating log recording behavior based on content properties. The transmission device determines whether to generate content logs based on specific attributes of each content item, allowing selective monitoring of only those content items that require tracking, thus reducing overall data storage requirements while maintaining precision for high-priority content.
Data Source
AI summary
In a content-log analyzing system, content includes additional information indicating, according to a property of the content, whether or not to record communication of the content in a content-log. When transmitting content to a TV or a PC, a data-communication controlling device judges whether or not to record the communication in a content-log based upon additional information of the content, and when judging affirmatively, generates and stores content-log information. A content-log analyzing server obtains the content-log stored in the data-communication controlling device, and analyzes the obtained content-log.