Today s the data security is very necessary due to the wide uses of internet and the occurred development in communication media. So that any data needs to be secured and protected by encrypted it to not be shown in its real form. In this paper the Genetic Algorithm (GA) was proposed for encryption any type of data file (image-with any type-, text, audio, or video), with proposing a new algorithm to produce a key that was used in GA for encryption process using the operations of GA (crossover and mutation). The proposed encryption method can be used with watermarking and steganography, it is concerned the digital data integrity, security, confidentiality, and authenticity.