P‐5.6: A Coverless Image Steganography Technique Based on Discrete Cosine Transform

Le résumé fourni par la source

Image steganography transmits information by embedding secret messages within images and is widely applied in fields such as copyright protection and secure communication. Traditional steganographic methods alter image parameters, although changes are often imperceptible to the naked eye, the hidden information may still be detected. This paper proposes a carrier‐free image steganography method based on discrete cosine transform. By dividing the image into multiple blocks and calculating their frequency domain values, information is transmitted through block‐to‐block numerical comparisons. Since information is not directly embedded, this method can effectively resist steganalysis detection and demonstrates strong robustness in image processing and subjective evaluation, while also having the ability to resist geometric attacks, showing great application potential.

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