Paper Details

This technology proposes a lossless, a reversible, and a combined knowledge activity schemes for cipher textpictures encrypted by public key cryptosystems with probabilistic and holomorphic properties. Within the lossless theme,the cipher text pixels are replaced with new values to introduce the extra knowledge into many LSB-planes of cipher textpixels by multiple layer wet paper writing. Then, the embedded knowledge are often directly extracted from the encrypteddomain and therefore the knowledge embedding operation doesn't have an effect on the secret writing of originalplaintext image. Within the reversible theme, a preprocessing is used to shrink the image bar chart before image coding,so the modification on encrypted pictures for knowledge embedding won't cause any component oversaturation inplaintext domain. Though a small distortion is introduced, the embedded knowledge is often extracted and therefore theoriginal image are often recovered from the directly decrypted image. As a result of the compatibility between thelossless and reversible schemes, the info embedding operations within the 2 manners are often at the same timeperformed in associate degree encrypted image. With the combined technique, a receiver could extract a neighborhoodof embedded knowledge before secret writing, and extract another part of embedded knowledge and recover the firstplaintext image when secret writing.

Prof. A. N. Gedam, Pooja Nehul, Sushant Shinde, Irshad Shaikh, “An Information Security Technique Using Steganography”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 4, Issue 3, pp. 649-655, March 2017.