14-11-2017, 04:08 PM
BPCS-Steganography (steganography of bit-plane complexity segmentation) is a type of digital steganography. Digital steganography can hide confidential data (that is, secret files) very securely by embedding them in some media data called "ship data". The ship's data is also known as "bearer, cover or fictitious data". In BPCS-steganography, true-color images (ie, 24-bit color images) are used primarily for ship data. The embedding operation in practice is to replace the "complex areas" in the bit planes of the ship image with the confidential data. The most important aspect of BPCS-Steganography is that the insertion capacity is very large. In comparison with the simple image-based steganography that uses only the least important bit of data, and therefore (for a 24-bit color image) it can only embed data equivalent to 1/8 of the total size, BPCS-steganography uses multiple bit planes, and thus can embed a much larger amount of data, although this depends on the individual image. For a "normal" image, approximately 50% of the data can be replaceable with secret data before the image degradation becomes apparent.
