Partisi Informasi untuk Keamanan Citra Berwarna Menggunakan Enkripsi RSA dan Pengacakan Urutan Layer Citra

Abstract

A secret image that will be transmitted over the public channel on the internet is vulnerable to the intervention by an unauthorized person. One of the technique to establish the image security is using information partition with RSA encryption. RSA algorithm has a high level of security and difficult to be attack if using a big value of different key pair because it is very hard to factoring the large modulus of n. In this research, each pixel of the secret image is encrypted using 32 byte RSA, which is small value of different keypair. The encryption process result four scrambled images. Each image has three layers that are red, green, and blue, thus the encrypted image has 12 layers. We can’t avoid the detection of image by cryptanalist. The attempt to do is increasing the security of secret image with randomization sequence of image layer using a permutation function. Thus, the original image can’t be decrypted even the security of 32 byte RSA have been attacked. The secret image can only be decrypted by the legitimate receiver