© 2004 Computer Academic Underground
Using Least-Significant Bits
*Similar to the audio method discussed earlier, you can use the least-significant bits of each byte to embed a message
*Using a 24-bit image, you can hide three bits of data in each pixel’s color value
*Using a 1024x768 pixel image, you can hide up to 2,359,296 bits (or 294,912 bytes)
*Compressing your message before embedding allows for a relatively large message
•Similar to the audio example we discussed earlier, you can use the least-significant bits of each byte to embed a message.
•Because each pixel’s color value is represented by three bytes, you can hide three bits of data in each pixel.
•This allows for a relatively large amount of data to be embedded within an image, however it’s still only 1/8th the size of the cover-image.
•Compressing your message prior to embedding it can allow for an even larger amount of data to be hidden.