Today, the demand of internet has made the transmission of digital media much easier and faster. Open nature of internet, risks of illegitimate accessing and unauthorized tempering with transmitted data is increased day by day. Protection of secret information from unauthorized users in a public network has become an important issue. Data hiding is one of the most demanding techniques to protect the security of digital media. The concept of reversible data hiding techniques for digital images involves many simple to complex algorithms each one aiming to provide data security measures.