Author

Sajani Vithana

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Preprint Sep 2026

Feedback Coding Enables Inference-Time Covert Agentic Communication

This work recast black-box black-box LLM steganography as a sequential communication problem with causal, noiseless feedback: every generated token is observed by both parties and can guide subsequent embedding.

Si-Dong Guo, Sajani Vithana, Atefeh Gilani et al. · 1 citation

Jul 2026

Optimal Domain-Aware Privacy Mechanisms for Synthetic Data Generation

This work considers normalized histograms as distribution estimators and characterize the asymptotically optimal domain-aware privacy mechanism within a specific class of DP mechanisms, and introduces PubMix, a public-data-aware DP mechanism that can be used in histogram-based data synthesis pipelines.

Sajani Vithana, Sangwon Jung, Haoyang Hu et al. · arXiv.org · 0 citations