Data Concealing using BPCS based multimedia Steganography Combined with Cryptography

In communication, data can be in any form. There are many programs that continuously keep watch on the secret information while transferring the messages from one place to other. In many cases such secret messages attacked by opponents and could be misused. So there is need to send data in concealed form. Steganography means Covered Writing. Cryptography means secret writing. Steganography conceals the data or information in such a way that nobody can see the hidden message or even its existence can’t be predicted. There are several existing techniques of data hiding like RDH-EI and LSB but all these techniques have limited amount of data hiding capacity. BPCS (Bit Plane Complexity Segmentation) Steganography is a technique that provides high data hiding capacity. In BPCS data is hidden into the bit planes of the cover image. Basically Bit Plane Complexity Segmentation algorithm is depends on the characteristics of HVS (human vision system ) in which a human not able to see any information in more complex blocks/binary patterns, So that secret data is placed into all complex blocks/binary patterns. For cryptography purpose this paper uses standard AES algorithm. The main aim of this paper is to provide the robust system which embed the secrete data into multimedia file using BPCS and gains security which avoids the attention of hackers and hacking tools from secret information which is concealed into multimedia file.