Communication Device Freshness State Tracking for Authentication Failures
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Solution Overview
Problem
In communication networks, the loss of a freshness value due to power interruptions can lead to incomplete authentication, making it difficult to distinguish between genuine errors and cyber attacks, as existing systems cannot accurately determine the cause of authentication failures.
Innovation Solution
Implement a communication device that stores and manages freshness values, including a processing device to track the loss of the first element and transmit notifications to other devices, allowing for accurate determination of authentication failures caused by value loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transmission device temporarily stores the first element of the freshness value, then the freshness value can be used for message transmission, but the stored value may be lost if power supply is instantaneously interrupted
Solution Approach 1:
The transmission device performs preliminary action by storing indication information about the first element of the freshness value in non-volatile storage before power interruption occurs. This allows the device to recover the freshness value state after power restoration without complete loss, thereby maintaining authentication reliability while preventing information loss.
Solution Approach 2:
The system creates a copy of the freshness value state by storing indication information in both volatile and non-volatile storage. The non-volatile storage serves as a backup copy that persists through power interruptions, allowing recovery of the authentication state without losing the freshness value.
2Difficulty of detecting and measuring
If the reception device records error information when authentication fails, then authentication failures can be detected, but it cannot be determined whether the failure is due to freshness value loss or other events such as cyber attacks
Solution Approach 1:
The reception device implements feedback by recording not only that authentication failed but also the specific cause - whether the first element of the freshness value was lost or if another error occurred. This feedback mechanism enables differentiated detection of authentication failures, allowing the system to distinguish between freshness value loss and other security events like cyber attacks.
Solution Approach 2:
The error information is segmented into different types: one type indicates freshness value loss, another type indicates other authentication failures. This segmentation allows the reception device to detect and categorize different failure causes separately, providing precise identification of the authentication failure reason.
Data Source
AI summary
The communication device that manages the first element of the freshness value transmits information indicating the first element to another communication device. The other communication device stores the received first element. A transmitting device, which is a communication device that transmits a message, transmits a message including a freshness value incorporating a stored first element. A receiving apparatus, which is a communication device that receives a message, attempts to authenticate the message by comparing a freshness value included in the received message with the freshness value that incorporates the first element stored therein. When the authentication fails, the reception device stores error information indicating that the authentication fails. The transmission device stores information indicating that the first element is lost after the first element is lost and before receiving the information indicating the first element.