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Stealthy Cyber Anomaly Detection On Large Noisy Multi-material 3D Printer Datasets Using Probabilistic Models...

Publication Type
Conference Paper
Book Title
AMSec'22: Proceedings of the 2022 ACM CCS Workshop on Additive Manufacturing (3D Printing) Security
Publication Date
Page Numbers
25 to 38
Publisher Location
Los Angeles, California, United States of America
Conference Name
International Workshop on Additive Manufacturing Security (AMSec 2022)
Conference Location
Los Angeles, California, United States of America
Conference Sponsor
Conference Date

As Additive Layer Manufacturing (ALM) becomes pervasive in industry, its applications in safety critical component manufacturing are being explored and adopted. However, ALM's reliance on embedded computing renders it vulnerable to tampering through cyber-attacks. Sensor instrumentation of ALM devices allows for rigorous process and security monitoring, but also results in a massive volume of noisy data for each run. As such, in-situ, near-real-time anomaly detection is very challenging. The ideal algorithm for this context is simple, computationally efficient, minimizes false positives, and is accurate enough to resolve small deviations. In this paper, we present a probabilistic-model-based approach to address this challenge. To test our approach, we analyze current measurements from a polymer composite 3D printer during emulated tampering attacks. Our results show that our approach can consistently and efficiently locate small changes in the presence of substantial operational noise.