Frustratingly Easy Edit-based Linguistic Steganography with a Masked Language Model

• URL: http://arxiv.org/abs/2104.09833v1
• Date: Tue, 20 Apr 2021 08:35:53 GMT
• Title: Frustratingly Easy Edit-based Linguistic Steganography with a Masked Language Model
• Authors: Honai Ueoka, Yugo Murawaki and Sadao Kurohashi
• Abstract summary: We revisit edit-based linguistic steganography, with the idea that a masked language model offers an off-the-shelf solution. The proposed method eliminates rule construction and has a high payload capacity for an edit-based model. It is also shown to be more secure against automatic detection than a generation-based method while offering better control of the security/payload capacity trade-off.
• Score: 21.761511258514673
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: With advances in neural language models, the focus of linguistic steganography has shifted from edit-based approaches to generation-based ones. While the latter's payload capacity is impressive, generating genuine-looking texts remains challenging. In this paper, we revisit edit-based linguistic steganography, with the idea that a masked language model offers an off-the-shelf solution. The proposed method eliminates painstaking rule construction and has a high payload capacity for an edit-based model. It is also shown to be more secure against automatic detection than a generation-based method while offering better control of the security/payload capacity trade-off.

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