Secure Joint Source-Channel Coding of Multimodal Semantic Sources
Abstract
We study the problem of secure joint source-channel coding for multimodal semantic sources transmitted over noisy wiretap channels. The source model consists of m modalities (e.g., image, audio, and sensor data), all represented as random variables. The encoder observes independent and identically distributed samples of an arbitrary non-empty subset of modalities, which are encoded, using wiretap coding with a help of a secret key shared with the legitimate receiver, and transmitted over a discrete memoryless wiretap channel. The legitimate receiver reconstructs all modalities. We extend the rate-distortion-perception characterisation to semantic unimodal and multimodal sources. We establish outer and inner bounds on the tradeoff between transmission rate, key rate, fidelity, and secrecy under per-modality distortion and perception constraints, and per-subset equivocation constraint. The bounds coincide for the less noisy wiretap channels. Our results show that the fundamental limit for secrecy consists of three operationally distinct components: the level of compression of each subset of modalities, the secret key rate, and the statistics of the wiretap channel.
Related
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BibTeX
@misc{kozlov2026secure,
title = {{Secure Joint Source-Channel Coding of Multimodal Semantic Sources}},
author = {Denis Kozlov and Mahtab Mirmohseni and Rahim Tafazolli},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2605.14334},
eprint = {2605.14334},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2605.14334},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Secure Joint Source-Channel Coding of Multimodal Semantic Sources
AU - Denis Kozlov
AU - Mahtab Mirmohseni
AU - Rahim Tafazolli
PY - 2026
DA - 2026/10/12
PB - arXiv
DO - 10.48550/arxiv.2605.14334
UR - https://arxiv.org/abs/2605.14334
AB - We study the problem of secure joint source-channel coding for multimodal semantic sources transmitted over noisy wiretap channels. The source model consists of m modalities (e.g., image, audio, and sensor data), all represented as random variables. The encoder observes independent and identically distributed samples of an arbitrary non-empty subset of modalities, which are encoded, using wiretap coding with a help of a secret key shared with the legitimate receiver, and transmitted over a discrete memoryless wiretap channel. The legitimate receiver reconstructs all modalities. We extend the rate-distortion-perception characterisation to semantic unimodal and multimodal sources. We establish outer and inner bounds on the tradeoff between transmission rate, key rate, fidelity, and secrecy under per-modality distortion and perception constraints, and per-subset equivocation constraint. The bounds coincide for the less noisy wiretap channels. Our results show that the fundamental limit for secrecy consists of three operationally distinct components: the level of compression of each subset of modalities, the secret key rate, and the statistics of the wiretap channel.
ER -