Cover medium
Definition
The original, unmodified carrier file (image, audio, video, or document) into which secret data will be embedded. The cover medium is chosen to appear ordinary so that the existence of hidden data is not suspected.
Related terms
- DCT coefficient embedding
- A steganographic technique that hides data in the quantised discrete cosine transform coefficients of a JPEG image after compression. Because the embedding...
- LSB substitution
- Least-significant-bit substitution: the lowest-order bit of each sample value (pixel colour channel or audio sample) is overwritten with one bit of the...
- Spread-spectrum embedding
- A technique that distributes the energy of the hidden message across many frequency components at very low amplitude, similar to a wideband...
- Steganalysis
- The forensic discipline of detecting the presence of hidden data in a carrier file. Steganalysis uses statistical tests (chi-squared, RS analysis, sample...
- Stego object
- The modified carrier file containing the embedded secret data. A stego object should be visually or audibly indistinguishable from the cover medium,...
Explained in
- Steganography Principles and Common Carrier FormatsThe original, unmodified carrier file (image, audio, video, or document) into which secret data will be embedded. The cover medium is chosen to appear ordinary...