A Unique Approach to Multimedia Based Dynamic Symmetric Key Cryptography?

In the past decades, Most of the cryptography and steganography based techniques emphasized on securing text or images only. They made use of traditional approaches like transpositions or substitutions for text security and image transformation techniques for image security. None of them completely ensures the safety of data from bruit-force methods, applied by spy-bots. To provide more security large key size and complex procedures have been adopted. This creates extra computational overhead for CPU. Some algorithms introduced security of MMS and Videos, but they primarily focused on encrypting few image frames from entire video with traditional image cryptography. In this paper, we propose an efficient symmetric key based security approach that generates dynamic key from a multimedia file to encrypt any type of multimedia data. In this technique, the dynamic key is chosen randomly from the multimedia file using a special function. This approach gives zero loss results in terms of all the user data and the multimedia content used for encryption. The use of simple operations to select the key and to encrypt the data makes it faster.