Efficient and Secure Approach to Image Encryption and Transmission

Scientific Essay from the year 2014 in the subject Computer Science - IT-Security, grade: 9, - (VMKV ENGINEERING COLLEGE), course: PhD, language: English, abstract: Many challenging computer vision and image processing problems are being solved using compressive sensing with sparse representation algorithms. Compressive sensing integrates sensing and compressing. All natural images have sparse representation in certain basis. Example: Wavelets, DCT etc. This property has been used in this paper to provide compression with sparse representation. An increasing amount of information such as text, image, audio and video are being transmitted over the Internet. To have a lesser communication bandwidth and storage, compression is required. To ensure security and user privacy of the sensed images, encryption becomes an important requirement. The main objective of the work is to develop secure image-encryption techniques, by means of combining the two techniques: encryption and compression. In this technique, a wavelet transform is used to decompose the image and decorrelate its pixels into approximation and detail components. The approximation component is encrypted using chaos based encryption algorithm which provides a good diffusion and confusion properties. The detail components are compressed using Wavelet Transform. This proposed algorithm can provide a high security level for image cryptosystems to provide an efficient and secure approach to real-time image encryption and transmission.