Image encryption based on multiplicative ciphers

الملخص EN

Every day, the network transfers millions of images.

in this paper the attempt has been made to to suggest a method to transfer the photographs securely, because some of them are private and confidential.

to transmit images safely, cryptography is essential.

this paper provides a secure image encryption method based on finite field theory.

we consider a finite field containing 257 elements.

a provided domain is a set in which multiplication, addition, subtraction, and division are performed, just like with any other domain.

the algorithm was performed using multiplication and division.

we consider a finite field containing 257 elements, integer modulo p when p is a prime number, which provides the most common example of finite fields.

in our case p = 257.

we apply it to multiplicative ciphers to encrypt the binary data in images byte by byte.

the proposed model was tested on various images.

information entropy, the correlation coefficient between adjacent pixels, mse and psnr were also measured to assess the complexity of encrypted images.