A Case for Feedforward Control with Feedback Trim to Mitigate Time Transfer Attacks
| Autor: | Mani Srivastava, Fatima M. Anwar |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
021110 strategic
defence & security studies General Computer Science Network packet business.industry Computer science Testbed 0211 other engineering and technologies Feed forward 020206 networking & telecommunications 02 engineering and technology Clock synchronization Synchronization 0202 electrical engineering electronic engineering information engineering Key (cryptography) Time transfer Safety Risk Reliability and Quality business Precision Time Protocol Computer network |
| Zdroj: | ACM Transactions on Privacy and Security. 23:1-25 |
| ISSN: | 2471-2574 2471-2566 |
| DOI: | 10.1145/3382503 |
| Popis: | We propose a new clock synchronization architecture for systems under time transfer attacks. Facilitated by a feedforward control with feedback trim --based clock adjustment, coupled with packet filtering and frequency shaping techniques, our proposed architecture bounds the clock errors in the presence of a powerful network attacker capable of attacking packets between a master and a client. A key advantage is consistent measurements, timely coordination, and synchronized actuation in distributed systems. In contrast, current time synchronization architectures behave poorly under attacks due to assumptions that the network is benign and delays are symmetric. The usage of feedback controllers aggravates poor performance. We provide an architecture that is indifferent to delays and eases the integration to traditional protocols. We implement a delay attack--resistant precision time protocol and validate the results on a hardware-supported testbed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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