HTTP Response Template for Dynamic Content Isolation
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Solution Overview
Problem
Automated web scanners face challenges in distinguishing between normal and malicious changes in HTTP responses due to dynamic content, such as ad banners and timestamps, which can change even with identical requests, making it difficult to detect attacks using differential analysis.
Innovation Solution
A system that creates a template by comparing multiple HTTP responses to identify and isolate dynamic content, allowing for easier recognition and analysis, by tagging and highlighting changes, and characterizing HTML tags based on their behavior across responses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If differential analysis is used to compare HTTP responses to detect attacks, then security detection capability is improved, but false positives increase due to dynamic content changes
Solution Approach 1:
The patent segments HTTP responses into static and dynamic content portions. By dividing the response structure and identifying which parts change between requests, the system can compare only the relevant static portions for security analysis while ignoring dynamic elements like timestamps and session identifiers that naturally change.
Solution Approach 2:
The patent introduces an intermediary component that identifies and masks dynamic content before differential analysis is performed. This intermediary layer processes the HTTP responses to remove or placeholder dynamic elements, allowing the subsequent comparison to focus only on static security-relevant content without being confounded by expected dynamic changes.
2Measurement precision
If multiple HTTP responses are compared to identify dynamic content, then accuracy of dynamic content identification is improved, but processing time increases
Solution Approach 1:
The patent performs preliminary identification of dynamic content patterns by comparing a small subset of HTTP responses before full security analysis. By establishing which content portions are dynamic in advance through initial comparisons, the system avoids performing exhaustive comparisons across all responses during the main security scanning phase.
Solution Approach 2:
The patent changes the parameter of comparison scope by initially analyzing only specific portions of HTTP responses to identify dynamic content characteristics. Once dynamic regions are identified, subsequent analysis focuses only on static regions, effectively changing the analyzed parameter set to reduce processing time while maintaining identification accuracy.
Data Source
AI summary
Identifying of dynamic content in HTTP responses includes comparing responses to HTTP requests, identifying portions of the responses that are different as dynamic content, and creating a template that designates the dynamic content.