Amirhoushang Arab Avval - Department of Research and Development Ports and Maritime Organization Chabahar, Sistan and Baluchestan, Iran
Jila ayubi - Department of Electrical engineering Meraaj Higher Education Institue Salmas, West Azarbayjan, Iran
Farangiz Arab - Department of Gaedi Health Center, Isfahan Medical Sciences University Isfahan, Isfahan, Iran

A novel and robust chaos-based digital image encryption is proposed. The present paper presents a cipher block image encryption using multiple chaotic maps to lead increased security. An image block is encrypted by the block-based permutation process and cipher block encryption process. In the proposed scheme, secret key includes nineteen control and initial conditions parameter of the four chaotic maps and the calculated key space is 2883. The effectiveness and security of the proposed encryption scheme has been performed using the histograms, correlation coefficients, information entropy, differential analysis, key space analysis, etc. It can be concluded that the proposed image encryption technique is a suitable choice for practical applications.

Image Encryption; Chaos; Chaotic Maps; High Security