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PIXEL INDICATOR HIGH CAPACITY TECHNIQUE FOR RGB IMAGE BASED STEGANOGRAPHY Adnan Gutub

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.

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PIXEL INDICATOR HIGH CAPACITY TECHNIQUE FOR RGB IMAGE BASED STEGANOGRAPHY Adnan Gutub

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  1. 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

  2. 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-

  3. Pixel Indicator Technique Process

  4. 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.

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

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

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

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

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

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

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

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

  13. 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.

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