Image Encryption Based on Improved Chaotic Sequences

Image encryption is an active and challenging research area. This article proposes a transposing and scrambling image encryption algorithm based on improved hyper-chaotic sequence to provide enhanced security for encrypted image transmission. The algorithm processes the hyper-chaotic sequence according to the pixel information, which makes the keys be sensitive to original image. Then we apply scrambling and transposing operation to the pixels in image, according to separate scrambling keys and grayscale transposing keys. The result of simulation shows that, the encryption algorithm proposed by this article is effective in image encryption and decryption, which could enhance the security of image encryption and reduce the risk of attack.