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To mitigate this bottleneck, we study synthetic generation at the protocol-feature and process-signal level, where samples must simultaneously preserve temporal coherence, match continuous marginal distributions, and keep discrete supervisory variables strictly within valid vocabularies. We propose Mask-DDPM, a hybrid framework tailored to mixed-type, multi-scale ICS sequences. Mask-DDPM factorizes generation into (i) a causal Transformer trend module that rolls out a stable long-range temporal scaffold for continuous channels, (ii) a trend-conditioned residual DDPM that refines local stochastic structure and heavy-tailed fluctuations without degrading global dynamics, (iii) a masked (absorbing) diffusion branch for discrete variables that guarantees valid symbol generation by construction, and (iv) a type-aware decomposition/routing layer that aligns modeling mechanisms with heterogeneous ICS variable origins and enforces deterministic reconstruction where appropriate. Evaluated on fixed-length windows ($L=96$) derived from the HAI Security Dataset, Mask-DDPM achieves stable fidelity across seeds with mean KS = 0.3311 $\pm$ 0.0079 (continuous), mean JSD = 0.0284 $\pm$ 0.0073 (discrete), and mean absolute lag-1 autocorrelation difference = 0.2684 $\pm$ 0.0027, indicating faithful marginals, preserved short-horizon dynamics, and valid discrete semantics. The resulting generator provides a reproducible basis for data augmentation, benchmarking, and downstream ICS protocol reconstruction workflows. -\keywords{Machine Learning \and Cyber Defense \and ICS} +\keywords{Machine Learning \and Attack Synthesis \and ICS} \end{abstract} \section{Introduction} diff --git a/texput.log b/texput.log index 34b4c65..43ab38e 100644 --- a/texput.log +++ b/texput.log @@ -1,4 +1,4 @@ -This is pdfTeX, Version 3.141592653-2.6-1.40.28 (MiKTeX 25.12) (preloaded format=pdflatex 2026.4.14) 20 APR 2026 17:58 +This is pdfTeX, Version 3.141592653-2.6-1.40.28 (MiKTeX 25.12) (preloaded format=pdflatex 2026.4.14) 21 APR 2026 17:01 entering extended mode restricted \write18 enabled. %&-line parsing enabled.