Algo for a paper Steganography

Replies

• 

  rahul69

  bugade Anu

  I have studied a paper recently based on steganography and i am seeking for a simple working algorithm ...can anybody post it please..i've gone through some algorithms which are quite complex for a beginner to understand.

  Steganography is complex in itself, as you are hiding the data. So in order to do so, u must know the data format of the carrier as well as algorithm which u are going to hide your data in it.
  For simplification, E.g we have a 24 bit bmp file, so each pixel will be having 3 bytes,(3X8=24) one for each R,G and B. Take for example of byte of R (Red) part 1byte=8 bits.
  (ie value from 0 to 255). Let us assume the value of this R is 8 (00001000) and if we want to store our value of 2 in it, it becomes (00001010)=10, but this change is negligible & so it will not reflect in the color of image. Similarly for G & B parts we may
  store some other values (and we know we are change only 2 Lower Bits),
  In this manner we store our data in the file.
  While decrypting the message we know we need to read only 2 lower Bits, so reading 2 lower bits of each pixel (R,G,B) of the file will give us back our message, which we encoded.
  This is the simplest way I could think of putting it.
  Hope it helps!
• 

  bugade Anu

  rahul69

  Steganography is complex in itself, as you are hiding the data. So in order to do so, u must know the data format of the carrier as well as algorithm which u are going to hide your data in it.
  For simplification, E.g we have a 24 bit bmp file, so each pixel will be having 3 bytes,(3X8=24) one for each R,G and B. Take for example of byte of R (Red) part 1byte=8 bits.
  (ie value from 0 to 255). Let us assume the value of this R is 8 (00001000) and if we want to store our value of 2 in it, it becomes (00001010)=10, but this change is negligible & so it will not reflect in the color of image. Similarly for G & B parts we may
  store some other values (and we know we are change only 2 Lower Bits),
  In this manner we store our data in the file.
  While decrypting the message we know we need to read only 2 lower Bits, so reading 2 lower bits of each pixel (R,G,B) of the file will give us back our message, which we encoded.
  This is the simplest way I could think of putting it.
  Hope it helps![/
  

  rahul69

  Steganography is complex in itself, as you are hiding the data. So in order to do so, u must know the data format of the carrier as well as algorithm which u are going to hide your data in it.
  For simplification, E.g we have a 24 bit bmp file, so each pixel will be having 3 bytes,(3X8=24) one for each R,G and B. Take for example of byte of R (Red) part 1byte=8 bits.
  (ie value from 0 to 255). Let us assume the value of this R is 8 (00001000) and if we want to store our value of 2 in it, it becomes (00001010)=10, but this change is negligible & so it will not reflect in the color of image. Similarly for G & B parts we may
  store some other values (and we know we are change only 2 Lower Bits),
  In this manner we store our data in the file.
  While decrypting the message we know we need to read only 2 lower Bits, so reading 2 lower bits of each pixel (R,G,B) of the file will give us back our message, which we encoded.
  This is the simplest way I could think of putting it.
  Hope it helps!

  Thanks rahul..n yeah now i've got an idea about it.