Procedural Code Generation for Bot Detection Obfuscation
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Solution Overview
Problem
Current bot detection mechanisms are vulnerable to attackers who can easily manipulate challenge code and interrogation results due to the use of plain text, allowing malicious bots to bypass security measures.
Innovation Solution
The implementation of procedural code generation techniques to obfuscate challenge code and interrogation results, using reversible transformations and client-generated random values, making it difficult for attackers to understand the challenge code and outputs sent to the bot detection server.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If challenge code and interrogation results are sent as plain text, then it is easy for attackers to analyze and manipulate the code, but the ease of operation and debugging is improved
Solution Approach 1:
The patent applies procedural code generation to create obfuscated versions of the challenge code and interrogation results. Instead of sending plain text, the system generates transformed copies that preserve the functional behavior but hide the underlying logic and data structures from attackers, making analysis and manipulation significantly more difficult while maintaining the ability to debug through controlled deobfuscation
Solution Approach 2:
The patent transforms the challenge code and interrogation results by applying procedural generation techniques that change the parameters of the code representation. This includes transforming readable text into obfuscated forms with different structural parameters, making it difficult for attackers to understand and manipulate while preserving the essential functionality for legitimate clients
2Object-affected harmful factors
If procedural code generation is used to obfuscate challenge code, then security against manipulation is improved, but the device complexity increases
Solution Approach 1:
The patent segments the challenge code generation process into distinct procedural steps, where each segment handles a specific aspect of obfuscation. This modular approach manages complexity by breaking down the overall transformation task into smaller, more manageable components that can be independently developed and maintained
Solution Approach 2:
The patent introduces procedural code generation as an intermediary layer between the original challenge code and the transmitted data. This intermediary transformation process obfuscates the code while preserving its functional semantics, creating a buffer that protects against manipulation without requiring direct modification of the core security logic
3Object-affected harmful factors
If obfuscation techniques are applied to interrogation results, then attacker understanding is reduced, but the processing time increases
Solution Approach 1:
The patent applies obfuscation techniques in advance during the challenge code generation phase, before the actual interrogation and analysis occur. This preliminary transformation ensures that the obfuscated form is already in place when data is transmitted, reducing the need for real-time processing and minimizing time loss during critical detection operations
Data Source
AI summary
A method by one or more computing devices for obfuscating challenge code. The method includes obtaining challenge code for interrogating a client, inserting, into the challenge code, code for obfuscating outputs that are to be generated by the client, where the code for obfuscating the outputs includes code for applying a first chain of reversible transformations to the outputs using client-generated random values, interning strings appearing in the challenge code with obfuscated strings, inserting code for deobfuscating the obfuscated strings into the challenge code, inlining function calls in the challenge code, removing function definitions that are unused in the challenge code due to the inlining, reordering the challenge code without changing the functionality of the challenge code, and providing the challenge code for execution by the client.