Color Image Encryption Algorithm Based on Logistic-Sine-Cosine Mapping

The rapid development of technology has brought convenience for shooting and sharing images.However,with the ra-pid increase of image data,security problems such as leakage and tampering have frequently occurred.The application of image encryption technology is imminent.Especially the encryption of color images is in urgent need of improvement and development.The traditional encryption technology is mainly for data stream encryption,which is low in efficiency and large in calculation,ha-ving certain limitations.Based on the transformation domain encryption,the image is transformed from the spatial domain to the frequency domain for encryption,and then transformed to the spatial domain,which is a lossy encryption.Encryption based on chaos has a large key space,simple implementation,and fast encryption speed.However,multiple chaotic systems are generally required to enhance the security of encryption.For this reason,a simple and secure spatial encryption algorithm for the RGB three-channel color image is designed in this paper.The Logistic-Sine-Cosine mapping generates safer chaotic sequences.These chaotic sequences are used for four rounds of scrambling and spreading pixels.After a series of security analysis experiments,the security and effectiveness of the color image encryption algorithm based on Logistic-Sine-Cosine mapping have been verified.