Video Steganography Using Karhunen-Loève Transform

Steganography is the art and science of message hiding i.e. passing confidential message through the unsecure channel in such a way that the existence of secret message is unknown. Image and video are the very popular choice for cover media. Embedding efficiency, payload and robustness against attackers are the main key point to successfully design a steganography algorithm. Current steganography algorithm are lacking behind by preprocessing stage, which includes alteration procedure for both cover media and secret message. We address this problem by proposing a novel method to encode the secret image inside the cover video. Here we use Karhunen-Loeve Transform (KL transform), since it provides the image compression and then after we use our proposed algorithm to embed the secret image on that compact zone. The experimental results show higher data embedding capacity and decode the secret image effectively.