Adaptive DNS Authentication for DDoS Mitigation
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Solution Overview
Problem
Current DNS systems expose resource IP addresses before user authentication, making them vulnerable to DDoS attacks and unauthorized access, as they provide the same resource resolution process for all users without verifying their authorization status.
Innovation Solution
Implementing an adaptive DNS system that receives and validates authentication information from users and their devices, determining appropriate actions based on their authentication status, such as providing individualized network layer identifiers or delaying responses, to ensure only authorized users access the resource.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the DNS system provides the same resource resolution process for all users, then the system operation is simple and fast, but security is compromised as resource IP addresses are exposed before user authentication
Solution Approach 1:
The patent applies preliminary action by performing user authentication before providing resource resolution. The DNS server receives authentication information from the user device, validates it, and only then proceeds to resolve the resource IP address. This ensures that resource IP addresses are not exposed to unauthorized users, thereby improving security while managing system complexity through a structured authentication workflow
2Reliability
If the DNS system authenticates users before providing resource resolution, then security is improved, but response time increases due to additional validation steps
Solution Approach 1:
The patent applies partial action by implementing selective authentication. Not all DNS queries require full authentication - the system determines whether authentication is necessary based on the query type, user device characteristics, and resource sensitivity. This approach maintains security for critical resources while preserving fast response times for public resources, thereby balancing security improvement with response time constraints
3Adaptability or versatility
If the DNS system provides individualized responses based on authentication status, then customized access control is achieved, but device complexity increases
Solution Approach 1:
The patent applies local quality by providing different levels of service to different users based on their authentication status and device characteristics. Authenticated users receive customized resource resolutions with appropriate access controls, while unauthenticated users receive standard public resource resolutions. This targeted approach achieves flexible access control without requiring the entire DNS system to be complex, as only specific query handling paths are enhanced
Data Source
AI summary
A method, system, and computer-readable memory containing instructions include receiving a DNS request containing information related to user-specific information, device-specific information, and/or authentication information, analyzing the information, determining an appropriate action to take based on analyzing the status, and taking the appropriate action. Actions may include responding with an individualized network layer address or service location address, delaying sending a response message, sending a network layer address or service location address corresponding to a site containing authentication information, and sending a response with a network layer address or service location address with a web address configured to mimic the website related to the requested resource.