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This paper introduces a novel method based on auxiliary matrix to hide a text data in an RGB plane. To hide the data in RGB planes of image via scanning, encryption and decryption. To enhance the security, the scanning technique combines two different traversals – spiral and snake traversal. The encryption algorithm involves auxiliary matrix as a payload and consider the least significant bits of three planes. To embed the text message would in the form of ASCII values which are similar to the red plane values and least significant value of pixels in blue plane marks the position of pixels. The least significant bit of boundary values of green-plane signifies the message. These three planes are recombined to form the stego-image, to decrypt the message with the help of scanning in the red-plane and blue plane and green plane simultaneously. Performance evaluation is done using PSNR, MSE and entropy calculation and generated results are compared with some earlier proposed work to present its efficiency with respect to others.

Block Wise Data Hiding with Auxilliary Matrix