A coverless image steganography based on robust image wavelet hashing

[...]the secret data is divided into no overlapping segments. According to the documentation available, there are two types of steganography techniques for images: image steganography with data embedding and coverless image steganography. [...]frequency domain algorithms such as the discrete fourier transform (DFT) [11], discrete wavelet transform (DWT) [12], discrete cosine transform (DCT) [13] and integer wavelet transform (IWT) [14] have been presented that use modified coefficients for data embedding. According to experimental results, this method improves the retrieval accuracy and capacity [24].