Image and video encryption using SCAN patterns

摘要

This paper presents a new method for image and video encryption and a first stage lossy video compression based on frames difference before the encryption. The encryption methods are based on the SCAN methodology which is a formal language-based two-dimensional spatial accessing methodology which can generate very large number of scanning paths or space filling curves. The image encryption is performed by SCAN-based permutation of pixels and a substitution rule which together form an iterated product cipher. The video encryption is performed by first lossy compressing adjacent frame differences and then encrypting the compressed frame differences. The main characteristics of the proposed methods are image encryption, first stage compression-based frames differences and encryption of video whose compression error can be bounded pixelwise by a user specified value, very large number of encryption keys, and ability to encrypt large blocks of any digital data. Results from the use of the methods proposed here are also provided.