When Images are transmitted through network it may happens that any third person or any unauthorized user may try to read the contents of the secret image that may contain some confidential information. To prevent Image containing private and confidential information from leakage some security is needed. The commonly used methods for image security are Encryption and data hiding. Among them data hiding is seen to be most commonly used method for information security. Now a day's a new concept of mosaic image is used in the field of data hiding for secure image transmission. In this paper for secure image transmission a new type of mosaic image is created called as secret fragment visible mosaic image by dividing secret image into small tiles and then arranging these tiles in a puzzled format with the help of another image called as carrier image. To enable resultant mosaic image to look exactly similar to selected target image reversible color transformation is proposed. The information required for recovering the secret image is embedded into the mosaic image by using enhanced LSB algorithm. Further to allow fast transmission of image lossless compression is performed on resultant mosaic image.

1. S. Battiato, G. Di Blasi, G. M. Farinella, and G. Gallo, "Digital mosaic framework: An overview," Eurograph. —Comput. Graph. Forum, vol. 26, no. 4, pp. 794–812, Dec. 2007.
2. J. Kimand F. Pellacini, "Jigsaw image mosaics," in Proc SIGGRAPH, San Antonio, TX, Jul. 2002, pp. 657–664.
3. G. Di Blasi, G. Gallo, and M. Petralia, "Puzzle image mosaic," in Proc. IASTED/VIIP, Benidorm, Spain, Sep. 2005, pp. 33–37.
4. J. Tian, "Reversible data embedding using a difference expansion," IEEE Trans. Circuits Syst. Video Technol. , vol. 13, no. 8, pp. 890–896, Aug. 2003.
5. Z. Ni, Y. Q. Shi, N. Ansari, and W. Su, "Reversible data hiding," IEEE Trans. Circuits Syst. Video Technol. , vol. 16, no. 3, pp. 354–362, Mar. 2006
6. D. Coltuc and J. -M. Chassery, "Very fast watermarking by reversible contrast mapping," IEEE Signal Process. Lett. , vol. 14, no. 4, pp. 255–258, Apr. 2007
7. S. Lee, C. D. Yoo, and T. Kalker, "Reversible image watermarking based on integer-to-integer wavelet transform," IEEE Trans. Inf. Forens. Secur. , vol. 2, no. 3, pp. 321–330, Sep. 2007.
8. I. J. Lai and W. H. Tsai, "Secret-fragment-visible mosaic image—A new computer art and its application to information hiding," IEEE Trans. Inf. Forens. Secur. , vol. 6, no. 3, pp. 936–945, Sep. 2011.
9. Y. L. Lee and W. H. Tsai, "A New Secure Image Transmission Technique via Secret-Fragment-Visible Mosaic Images by Nearly Reversible Color Transformations," IEEE Trans. on circuit and systems for video Tech. , vol. 24, no. 4, Apr. 2014, pp. 695-703.
10. S. Gupta, G. Gujral and N. Aggrawal, "Enhanced Least Significant Bit algorithm For Image Steganography," IJCEM International Journal of Computational Engineering & Management, Vol. 15 Issue 4,pp. 40-42, July 2012.

Data Hiding Mosaic Image Secret Fragment Visible Mosaic Image Aes Security Algorithm.