In recent years, the advancement of digital technology has led to an increase in data transmission on the Internet. Security of images is one of the biggest concern of many researchers. Therefore, numerous algorithms have been presented for image encryption. An efficient encryption algorithm should have high security and low search time along with high complexity.DNA encryption is one of the fa...

A novel scheme for the watermarking of color images is presented in this communication. An attempt has been made to find the most appropriate alternative to the RGB color space. Color spaces with linear relation to the RGB color space with uncorrelated components are found to be most suitable for watermarking. Another objective has been to propose an adaptive watermarking scheme for any type of...

In this paper, by using Logistic, Sine and Tent systems we define a combination chaotic system. Some properties of the chaotic system are studied by using figures and numerical results. A color image encryption algorithm is introduced based on new chaotic system. Also this encryption algorithm can be used for gray scale or binary images. The experimental results of the encryption algorithm show...

A novel {2,2} visual cryptography scheme for processing color images based on a Karnaugh map design is introduced in this paper. The encryption and decryption functions are executed at the bit levels of the RGB color representation. The proposed scheme affords no pixel expansion and offers perfect reconstruction. Experimental results including in this paper support the main argument that the de...

The aim of our research is to develop a new framework for secure block cipher generation using color substitution and permutations on alphanumeric letters, symbols, images, diagrams or any kind of text. To transfer the keys from source to destination we have used RSA public key algorithm and for encryption / decryption of the information, we have used our invented „play color substitution‟ algo...

since long time ago, mobile metaphor and simile are most important mean for poetic images creation. the present paper studies bayati works according to the important role of the colors in poetic images creation in. we came to conclusion that the poet has used the colors in order to express his feelings, his unsatisfactory as well goals, aims and ideologies. the colors application or secret sema...