Image Encryption Using Keystreams Dependent on Plain-images
Ruisong Ye, Rong Fu, Shaojun Zeng, Chuting Lai, Junming Ma · Advances in intelligent systems research/Advances in Intelligent Systems Research · 2013
Image Encr yption Using Keystr eams Dependent on Plain-imagesThe communications of digital products over network grow rapidly in the past decades, and consequently it has been an urgent need to prevent them from leakages.Many applications, such as military image databases, confidential video conference, private photograph album, etc. require reliable, fast and robust secure system to store and transmit digital images.The requirements to fulfil the security needs of digital images have led to the development of effective image encryption algorithms.Digital images possess some intrinsic features, such as bulk data capacity, redundancy of data, strong correlation among adjacent pixels, being less sensitive as compared to the text data, etc.As a result, most conventional ciphers, such as Data Encryption Standard (DES), International Data Encryption Algorithm (IDEA), Advanced Encryption Standard (AES) [1], which consider plainimage as either block cipher or data stream, are thereby not suitable for practical digital image encryption in real time, because their speed is low due to a bulk data volume and strong correlation among adjacent pixels.Fortunately, many chaos-Ruisong Ye, Rong Fu, Shaojun Zeng, Chuting Lai, J unming Ma Abstr act.A novel chaos-based image encryption scheme is proposed in this paper.The encryption scheme consists of one permutation process and one diffusion process, in which the key streams are both one-time keys in the sense that they are dependent on plain-images.Several merits of the proposed image encryption scheme are achieved, including a huge key space, good statistical properties resisting statistical attack and differential attack, desirable resistance against knownplaintext and chosen-plaintext attacks.Experimental results have been carried out with detailed analysis to show that the proposed scheme can be a potential candidate for practical image encryption.