Affiliation:
1. SRM Institute of Science and Technology, India
Abstract
Despite current developments in the discipline of selective image encryption, some of the most pressing challenges still need to be solved concerning the degree of user-controlled encryption level. These research gaps have motivated the proposal of an encryption algorithm that gives the user control over the encryption level. It is based on JSMP map, the creation of random artificial image, OPT, and dynamic permutation matrix using lower upper (LU) decomposition. The secret key generated with the novel JSMP map makes it highly secured as it exhibits chaos in the enormous range of. The security analysis is conducted for different user choices u∈10,100, where u refers to the incremental degree of encryption from selective to full image encryption. Results show that the proposed technique achieves high efficiency when and degrades towards u=10, whereas the speed increases for to as it ranges from 10.97 MB/s to 23.27 MB/s, respectively. Therefore, the proposed cryptosystem can be chosen for various applications requiring different security levels.