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- Andrew D. Ker
- IEEE Signal Processing Letters
- 2005
We consider the problem of detecting spatial domain least significant bit (LSB) matching steganography in grayscale images, which has proved much harder than for its counterpart, LSB replacement. We… (More)
- Andrew D. Ker, Rainer Böhme
- Security, Forensics, Steganography, and…
- 2008
This paper revisits the steganalysis method involving a Weighted Stego-Image (WS) for estimating LSB replacement payload sizes in digital images. It suggests new WS estimators, upgrading the method’s… (More)
- Andrew D. Ker
- Information Hiding
- 2004
We consider methods for answering reliably the question of whether an image contains hidden data; the focus is on grayscale bitmap images and simple LSB steganography. Using a distributed computation… (More)
- Andrew D. Ker
- Information Hiding
- 2006
Conventional steganalysis aims to separate cover objects from stego objects, working on each object individually. In this paper we investigate some methods for pooling steganalysis evidence, so as to… (More)
- Tomás Pevný, Jessica J. Fridrich, Andrew D. Ker
- IEEE Trans. Information Forensics and Security
- 2012
- Rainer Böhme, Andrew D. Ker
- Security, Steganography, and Watermarking of…
- 2006
Quantitative steganalysis refers to the exercise not only of detecting the presence of hidden stego messages in carrier objects, but also of estimating the secret message length. This problem is well… (More)
- Andrew D. Ker
- Information Hiding
- 2005
There are many detectors for simple Least Significant Bit (LSB) steganography in digital images, the most sensitive of which make use of structural or combinatorial properties of the LSB embedding… (More)
- Tomás Filler, Andrew D. Ker, Jessica J. Fridrich
- Media Forensics and Security
- 2009
It is a well-established result that steganographic capacity of perfectly secure stegosystems grows linearly with the number of cover elements—secure steganography has a positive rate. In practice,… (More)
- Andrew D. Ker
- MM&Sec
- 2008
The literature now contains a number of highly-sensitive detectors for LSB replacement steganography in digital images. They can also estimate the size of the embedded payload, but cannot locate it.… (More)
- Andrew D. Ker
- IEEE Transactions on Information Forensics and…
- 2007
This paper proposes steganalysis methods for extensions of least-significant bit (LSB) overwriting to both of the two lowest bit planes in digital images: there are two distinct embedding paradigms.… (More)