Abstract

At this session of the NLIP Reading Group we’ll be discussing the following paper:

Brian Murphy and Carl Vogel. 2007. The syntax of concealment: reliable methods for plain text information hiding. In Proceedings of the SPIE International Conference on Security, Steganography, and Watermarking of Multimedia Contents.

Abstract: Many plain text information hiding techniques demand deep semantic processing, and so suffer in reliability. In contrast, syntactic processing is a more mature and reliable technology. Assuming a perfect parser, this paper evaluates a set of automated and reversible syntactic transforms that can hide information in plain text without changing the meaning or style of a document. A large representative collection of newspaper text is fed through a prototype system. In contrast to previous work, the output is subjected to human testing to verify that the text has not been significantly compromised by the information hiding procedure, yielding a success rate of 96% and bandwidth of 0.3 bits per sentence.