Design new image cryptosystem using hybrid block and stream ciphers.

In this paper, a new efficient cryptographic system will be designed based on constructing a hybrid cryptosystem which is consisting of stream and block cryptosystems in order to increase the security of the images. Many tests are made to check the efficiency of the proposed cryptosystem, like, General Complexity (Key Space), Key Sensitivity, Mean Squared Error, Correlation Tests, ... etc. were applied. The performance and the security of the new hybrid cryptography system was high which proved by the results of the applied tests. [ABSTRACT FROM AUTHOR]