Efficient Provably Secure Linguistic Steganography via Range Coding
Linguistic steganography involves embedding secret messages within seemingly innocuous texts to enable covert communication. Provable security, which is a long-standing goal and key motivation, has been extended to language-model-based steganography. Previous provably secure approaches have achieved perfect imperceptibility, measured by zero Kullback-Leibler (KL) divergence, but at the expense of embedding capacity. In this paper, we attempt to directly use a classic entropy coding method (range coding) to achieve secure steganography, and then propose an efficient and provably secure linguistic steganographic method with a rotation mechanism. Experiments across various language models sh...
| Authors | Ruiyi Yan, Yugo Murawaki |
|---|---|
| Primary category | cs.CL |
| Published | 9 April 2026 |
| Last updated at source | 13 April 2026 |
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