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Perturbed quantization steganography
| Content Provider | CiteSeerX |
|---|---|
| Author | Fridrich, Jessica Goljan, Miroslav Soukal, David |
| Abstract | In this paper, we use the recently proposed wet paper codes and introduce a new approach to passive-warden steganography called Perturbed Quantization. In Perturbed Quantization, the sender hides data while processing the cover object with an informationreducing operation that involves quantization, such as lossy compression, downsampling, or A/D conversion. The unquantized values of the processed cover object are considered as side information to confine the embedding changes to those unquantized elements whose values are close to the middle of quantization intervals. This choice of the selection channel calls for wet paper codes as they enable communication with nonshared selection channel. Heuristic is presented that indicates that the proposed method provides better steganographic security than current JPEG steganographic methods. This claim is further supported by blind steganalysis of a specific case of Perturbed Quantization for recompressed JPEG images. |
| File Format | |
| Journal | ACM Multimed. Security J |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Perturbed Quantization Steganography Perturbed Quantization Wet Paper Code Cover Object Lossy Compression Current Jpeg Steganographic Method Specific Case Nonshared Selection Channel Sender Hide Data Passive-warden Steganography Embedding Change New Approach Quantization Interval Unquantized Element Informationreducing Operation Steganographic Security Side Information Blind Steganalysis Unquantized Value Selection Channel Jpeg Image |
| Content Type | Text |
| Resource Type | Article |
