Abstract:
Images are widely used in the world for different purposes. So, the risk is increasing when sharing images through unsecured networks. In this paper we propose an algorithm to encrypt images by using Self-Invertible Matrix of Hill Cypher method. It is one of the symmetric techniques. We used 4×4 self- invertible matrix as the secret key. To ensure the security of our encryption method several widely used factors are considered here, including speed analysis, histogram analysis technique, Unified Average Changing Intensity (UACI), Number of Pixel Changing Rate (NPCR) and known plain text and chosen plain text attacks analysis.
