Image encryption technique based on chaotic system and hash function

摘要

Internet is an extensively used medium to share information in the form of text, audio, videos and images. Sharing of information in a large network at a long distance demands security to protect the information from unauthorized access. Network security plays an essential role in securing the information on an unreliable network. For securing the data on network, many encryption schemes have been found out and new innovative encryption schemes has been in demand because e-commerce, e-banking and multimedia applications are being accessed on internet on daily basis. Recently, cryptographic coding techniques are mostly used in securing the information on an unreliable network from unauthorized access. Several cryptographic techniques have been found by the researchers for securing and safely transmitting the information on an unreliable network. Among all the cryptographic techniques Image Encryption techniques is widely used to share images on an unreliable network. The objective of this paper is to represent the few encryption techniques which is used for the encrypting the image on an unreliable network. This paper proposes a new encryption technique to encrypt the image. The proposed method encrypts the image using Chaotic System, Wavelet Transform, along with that the fingerprint of the image is created using Hash Function which is to be transmitted to the receiver. The proposed method along with the privacy also maintains integrity of the image.