A Novel Approach for Image Steganography in Spatial Domain Using Last Two Bits of Pixel Value

In this present study a new method for insertion of message in an image is proposed. Wehave used last two bits of pixel for insertion and retrieval of message. This method is animprovement over earlier methods like Least Significant Bit (LSB) method [2], 6th and 7th bitmethod [5] and 6th, 7th and 8th bit method [6]. Our method provides us optimal solution incase of chances of message insertion at a pixel location such that the change at a pixel valuedoes not exceed range from +1 to -1 which is negligible to human eye.