Adnan Gutub Mahmoud Ankeer Muhammad AbuGhalioun

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Presentation transcript:

PIXEL INDICATOR HIGH CAPACITY TECHNIQUE FOR RGB IMAGE BASED STEGANOGRAPHY Adnan Gutub Mahmoud Ankeer Muhammad AbuGhalioun Abdulrahman Shaheen Aleem Alvi Computer Engineering Department King Fahd University of Petroleum & Minerals Dhahran, Saudi Arabia

Pixel Indicator Technique RGB images are of 24-bits per pixels. Use of LSB bits of one of the channels as indicator for data existence in the other two channels. The 2 LSB of indicator are based on Image nature. First indicator is chosen based on image length value property Steganography sequence: -RGB-RBG-GBR-GRB-BRG-BGR- Type of length (N) of secret message I Level Selection Select indicator channel, first element of sequence II Level Selection Binary N parity-bit Odd Parity Even Parity Even R GB BG Prime B RG GR Else G RB BR

Pixel Indicator Technique Process

Testing And Results Image size = 512 X 384 = 196608 pixels Secret text =11,733 characters length = 93,864 bits The test performed hiding data using 1 bit, 2 bits, 3 bits, 4 bits, 5bits. Histogram for each channel in each run was drawn. The number of pixels required each time was recorded.

Testing And Results (2bits) Using 2 bits as hidden data: Original (Cover)+ secret = Stega.obj.

Testing And Results (3bits) Using 3 bits as hidden data: Original (Cover)+ secret = Stega.obj.

Testing And Results (4bits) Using 4 bits as hidden data: Original (Cover)+ secret = Stega.obj.

Testing And Results (5bits) Using 5 bits as hidden data: Original (Cover)+ secret = Stega.obj.

Testing And Results (Red Channel) Original image, 2-bits, 4-bits and 5-bits:

Testing And Results (Blue Channel) Original image, 2-bits, 4-bits and 5-bits):

Testing And Results (Green Channel) Original image, 2-bits, 4-bits and 5-bits:

PIT Capacity: (Testing & Results) Secret data = 93,864 bits

Pixel indicator technique Remarks Histograms of the pixel indicator: Some channels will have data and some are not No difference in histogram (for data/indecator) More difficult to distinguish between data and indicator. With huge number of pixels in RGB and multi-bits per channel  high capacity.