Group VPN Key Management for Encrypted Traffic Inspection
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Solution Overview
Problem
Network devices such as intrusion detection systems and firewalls cannot effectively perform their functions on encrypted traffic flows, as they often rely on unencrypted parts of packets for decision-making, limiting their functionality.
Innovation Solution
An apparatus and method that utilize a membership logic to control membership in a group key system, allowing devices to request and receive a set of keys and roles, enabling them to process secure network traffic by inspecting, rewriting, or validating it based on these keys, including decryption and authentication processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If network devices process encrypted traffic without decryption keys, then network security inspection functionality is maintained, but the ability to inspect and analyze encrypted payload is lost
Solution Approach 1:
The patent introduces a key management system as an intermediary between network devices and encrypted traffic. The system issues decryption keys to authorized devices, enabling them to inspect encrypted payloads while maintaining security. The key management system mediates the balance between security inspection capabilities and encryption protection.
2Adaptability or versatility
If network devices obtain decryption keys to inspect encrypted traffic, then the ability to analyze encrypted payload is improved, but security control and authorization complexity increases
Solution Approach 1:
The key management system implements feedback mechanisms where network devices request keys based on their security policies and traffic inspection needs. The system evaluates these requests, grants appropriate keys, and monitors their usage. This feedback loop enables dynamic key distribution that adapts to changing security requirements without requiring complex manual authorization.
3Object-affected harmful factors
If network devices use only unencrypted packet parts for forwarding decisions, then encryption security is maintained, but forwarding decision accuracy is limited
Solution Approach 1:
The system performs preliminary decryption of encrypted payloads before forwarding decisions are made. Network devices use decryption keys to decrypt traffic, inspect the full payload content for accurate classification and routing decisions, then re-encrypt the traffic before forwarding. This preliminary action enables precise forwarding decisions while maintaining end-to-end encryption security.
Data Source
AI summary
Systems, methods, and other embodiments associated with processing secure network traffic are described. One example method includes determining whether a device is a preconfigured member of a group key system. If the device is not a preconfigured member then the method selectively establishes membership in the group key system by requesting membership from a group controller. The example method may also include receiving a set of keys from the group controller and being assigned a role by the group controller. The method may further include processing secure network traffic as an inspection point, a rewriting point, and/or a validation point based on the received set of keys and the assigned role(s).