I)ruid [CAU] - Steganography Primer

Identifying Redundant Bits

Many different techniques exist for identifying which redundant bits to use for embedding a message:

Using all of them

Using a pre-determined formula or key to use some of them

Random distribution

Complex formulas

Cover-image analysis in an attempt to defeat Steganalysis


	•There are a wide range of methods used to identify which redundant bits from a cover-medium you want to use.
	•These methods usually make up what could be compared to the algorithm component in cryptography and include methods like
		•Using all of them
		•Using a key or bit mask for selection
		•Random distribution or complex formulas, and
		•Selection based on cover-image analysis which is usually done in an attempt to thwart Steganalysis.
	•I’m not going to cover the various methods of identifying which redundant bits to use to embed a message because it could most likely fill an entire hour by itself.