Watermarking and0Encryption to Protect Multimedia Information

As the information technology is developing, frauds are also increasing simultaneously, daily new techniques are coming to improve the security of information, i. e. steganography, encryptions and security of transmit signals. In this paper I present a scheme to secure multimedia information. The aim is to develop a way for increasing security of the transmitted signals. First the encrypted algorithm which is being based on the chaotic iteration of the logistic is improved. Simultaneously my method is presented which improve the efficiency of composition.