TSN Time-Sync Frequency Adjustment for Faster Attack Detection
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Solution Overview
Problem
Time-synchronized networks (TSNs) are vulnerable to attacks that disrupt timekeeping, leading to incorrect synchronization and potential failures in time-sensitive applications due to the inability of intrusion detection systems (IDS) to detect security attacks in a timely manner, especially when attackers make small deviations in time information that escape immediate detection.
Innovation Solution
Implementing techniques to modify the frequency of message communication within TSNs, either statically or dynamically, to allow IDSs to detect security attacks faster by adjusting the rate at which time information messages are received and analyzed, thereby generating alerts before time-sensitive applications are disrupted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the frequency of time information messages is kept at normal levels, then network bandwidth is conserved and system operation is efficient, but intrusion detection systems cannot detect security attacks in a timely manner
Solution Approach 1:
The system dynamically adjusts the message frequency based on security conditions. During normal operation, messages are sent at standard intervals to conserve bandwidth. When an attack is detected or suspected, the frequency is increased to enable faster detection and response, thus resolving the contradiction between detection speed and resource consumption
Solution Approach 2:
The invention changes the parameter of message frequency from a static value to a variable that can be adjusted based on security requirements. By modifying this parameter, the system can optimize between detection capability and network resource usage, allowing fast detection when needed while maintaining efficient operation during normal conditions
2Reliability
If the frequency of time information messages is increased to enable faster attack detection, then security monitoring is improved, but network bandwidth is consumed at higher rates
Solution Approach 1:
The message frequency is made dynamic rather than static. The system monitors security conditions and adjusts the frequency accordingly, sending messages more frequently only when security threats are detected or suspected. This resolves the contradiction by ensuring high detection capability only when necessary, thereby conserving network bandwidth during normal operation
Solution Approach 2:
The invention modifies the message frequency parameter based on security requirements. By changing this parameter from a fixed value to an adjustable one, the system can optimize the trade-off between detection speed and bandwidth consumption, achieving fast detection when needed while minimizing resource usage during normal conditions
3Reliability
If small deviations in time information are monitored closely, then subtle attacks can be detected, but the complexity of the monitoring system increases
Solution Approach 1:
The invention introduces an intermediary layer (the IDS) that specializes in analyzing time information for security threats. This intermediary handles the complex task of detecting subtle deviations, allowing the rest of the system to remain relatively simple while still achieving high detection accuracy through the specialized monitoring component
Data Source
AI summary
Techniques include an apparatus to retrieve a first parameter for the IDS to monitor a device for a time-synchronized network. The first parameter may represent a number of messages the IDS needs to analyze in order to detect a security attack. The messages may comprise time information to synchronize a clock for a device to a network time for a time-synchronized network. The processor circuitry may retrieve a second parameter for a time sensitive application. The second parameter may represent a defined amount of time error tolerated by the time sensitive application, and determine a third parameter for the IDS based on the first and second parameters. The third parameter may represent a defined frequency to receive a number of messages with time information in order to detect the security attack on the device within a defined time interval. Other embodiments are described and claimed.