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Using Multiple Diacritics in Arabic Scripts for Steganography

Using Multiple Diacritics in Arabic Scripts for Steganography. By Yousef Salem Elarian Aleem Khalid Alvi. Contents. Introduction The classification tree of steganography Characteristics of the Arabic Script Related Work Approaches Evaluation. Introduction.

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Using Multiple Diacritics in Arabic Scripts for Steganography

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  1. Using Multiple Diacritics in Arabic Scripts for Steganography By Yousef Salem Elarian Aleem Khalid Alvi

  2. Contents • Introduction • The classification tree of steganography • Characteristics of the Arabic Script • Related Work • Approaches • Evaluation

  3. Introduction Stenography is the approach of hiding the very existence of secret messages.

  4. The classification tree of steganography

  5. Characteristics of the Arabic Script • The Arabic alphabet has Semitic origins derived from the Aramaic writing system • Arabic diacritic marks decorate consonant letters to specify (short) vowels • Dots and connectivity are two inherent characteristics of Arabic characters • Arabic basic alphabet of 28 letters, 15 have from one to three points , four letters can have a Hamzah, and one, ALEF, can be adorned by the elongation stroke, the Maddah

  6. Related Work • Little has been proposed for Arabic script steganography • Two inherent properties of Arabic writing, however, have been proposed: dots and connectability. • First work reveals their need for new fonts by introducing kashidah’s before/after such characters • The second suggestion would be to use Hamzated characters along with dotted ones.

  7. Approaches

  8. Approaches cont.. Figure 1: The degree of brightness of the diacritic marks repeated 1, 2, 3, 4 and 5 times each

  9. Approaches cont.. Table 2: Comparison between the two approaches in terms of capacity, robustness and security.

  10. Evaluation Table 2: The ratio of maximum usable to total characters in CCA, according four variations of the kashidh approach

  11. The End

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