Natural language processing for information assurance and security: an overview and implementations
Proceedings of the 2000 workshop on New security paradigms
Digital watermarking
A Practical Chunker for Unrestricted Text
NLP '00 Proceedings of the Second International Conference on Natural Language Processing
Hide and Seek: An Introduction to Steganography
IEEE Security and Privacy
Extracting paraphrases from a parallel corpus
ACL '01 Proceedings of the 39th Annual Meeting on Association for Computational Linguistics
Learning to paraphrase: an unsupervised approach using multiple-sequence alignment
NAACL '03 Proceedings of the 2003 Conference of the North American Chapter of the Association for Computational Linguistics on Human Language Technology - Volume 1
Syntax-based alignment of multiple translations: extracting paraphrases and generating new sentences
NAACL '03 Proceedings of the 2003 Conference of the North American Chapter of the Association for Computational Linguistics on Human Language Technology - Volume 1
Automatic paraphrase acquisition from news articles
HLT '02 Proceedings of the second international conference on Human Language Technology Research
Paraphrase identification on the basis of supervised machine learning techniques
FinTAL'06 Proceedings of the 5th international conference on Advances in Natural Language Processing
ICGI'10 Proceedings of the 10th international colloquium conference on Grammatical inference: theoretical results and applications
| Hi-index | 0.00 |
This paper describes the application of paraphrasing to steganography, using Modern Greek text as the cover medium. Paraphrases are learned in two phases: a set of shallow empirical rules are applied to every input sentence, leading to an initial pool of paraphrases. The pool is then filtered through supervised learning techniques. The syntactic transformations are shallow and require minimal linguistic resources, allowing the methodology to be easily portable to other inflectional languages. A secret key shared between two communicating parties helps them agree on one chosen paraphrase, the presence of which (or not) represents a binary bit of hidden information. The ability to simultaneously apply more than one rules, and each rule more than one times, to an input sentence increases the paraphrase pool size, ensuring thereby steganographic security.