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Steganography: Difference between revisions
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* Postembedding: Embed data into the encoded bitstream | * Postembedding: Embed data into the encoded bitstream | ||
==Methods== | |||
These specify the general techniques people have tried for steganography in videos. | |||
===Spatial Domain=== | |||
Spatial domain methods mainly focus on hiding data in the least significant bit (LSB) of videos. | |||
These methods are not robust to video compression. | |||
===Masking and Filtering=== | |||
These methods focus on altering the luminance. | |||
Also not robust to video compression. | |||
===Transformations=== | |||
They work by embedding the message in the LSB of the coefficients of the discrete cosine transform (DCT). | |||
===Compression Parameters=== | |||
These methods hide data in the motion vectors. | |||
Data can be hidden in the LSB or the phase of the motion vectors. | |||
==Resources== | ==Resources== | ||
* [https://pdfs.semanticscholar.org/e7b1/405d4f344aa0708c76a8f2b1a87c88d21c7c.pdf A Review on Data Hiding Techniques in Compressed Video] | * [https://pdfs.semanticscholar.org/e7b1/405d4f344aa0708c76a8f2b1a87c88d21c7c.pdf A Review on Data Hiding Techniques in Compressed Video] | ||
* [https://www.sciencedirect.com/science/article/pii/S0925231218312608 Video steganography: A review] | * [https://www.sciencedirect.com/science/article/pii/S0925231218312608 Video steganography: A review] | ||