Key Update State Machines for Mobile IP Network Synchronization
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Solution Overview
Problem
In mobile IP networks, existing key management systems are vulnerable to unauthorized access and cyber threats due to potential message loss and device failure during key update processes, which can lead to synchronization issues and security breaches.
Innovation Solution
A key update scheme that employs state machines to facilitate retransmissions of messages and ensures synchronization between mobile devices and AAA servers, using a sequence of states to guarantee successful key updates and network access, even in the presence of message loss or device failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If key updates are performed in mobile IP networks, then network security is improved, but message loss and device failure during updates can cause synchronization issues and security breaches
Solution Approach 1:
The patent implements preliminary actions by establishing state machines before key updates begin. These state machines predefine all possible states and transitions, ensuring that even if messages are lost or devices fail during the update process, the system can recover by following the predefined state transition paths. The state machines are configured to handle anticipated failure scenarios in advance.
Solution Approach 2:
The patent employs feedback mechanisms through state machines that continuously monitor the key update process. When message loss or device failure occurs, the state machines detect the abnormal state and trigger appropriate recovery actions. The system provides feedback loops that allow devices to retransmit messages or reset update processes based on the current state, ensuring synchronization is maintained despite failures.
2Reliability
If state machines are implemented for retransmissions, then key update robustness is improved, but system complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the key update process into distinct states within state machines. Each state represents a specific phase of the update process (e.g., key generation, message transmission, acknowledgment receipt). This segmentation allows the complex update process to be managed through discrete, manageable state transitions, reducing overall system complexity while maintaining robustness.
Solution Approach 2:
The patent utilizes parameter changes by defining specific parameters for each state in the state machines (e.g., message sequence numbers, acknowledgment flags, timeout values). By changing these parameters based on the current state and incoming events, the system can implement robust retransmission logic without requiring complex decision-making algorithms, thus balancing reliability with manageable complexity.
Data Source
AI summary
This disclosure describes a key update scheme for use in a mobile IP network. The update scheme may be implemented to facilitate key updates between a mobile device and a server computer that authenticates the mobile device. The techniques described herein can facilitate key updates in a manner that accounts for potential message loss during the update routine, mobile device failure during the update routine, or other problems typically encountered in a mobile network settings. In this manner, the techniques can provide a robust scheme for key updates and may improve network security.