摘要：This article proposes bit flipping method to conceal secret data in the
original image. Here a block consists of 2 pixels and thereby flipping one or two LSBs
of the pixels to hide secret information in it. It exists in two variants. Variant-1 and
Variant-2 both use 7th and 8th bit of a pixel to conceal the secret data. Variant-1
hides 3 bits per a pair of pixels and the Variant-2 hides 4 bits per a pair of pixels.
Our proposed method notably raises the capacity as well as bits per pixel that can be
hidden in the image compared to existing bit flipping method. The image
steganographic parameters such as, Peak Signal to Noise Ratio (PSNR), hiding
capacity, and the Quality Index (Q.I) of the proposed techniques has been compared
with the results of the existing bit flipping technique and some of the state of art
article.
关键词：Steganography; Least Significant Bit (LSB) substitution; bit flipping;;
capacity.
