The main purpose of the data encryption process is the difficulty of understanding the content of the message with the difficulty of detecting the encryption mechanism. Therefore, in this paper we proposed a new model of encryption based on the idea of encrypting text messages and gray images using amino acid chains. Amino acids are distinguished by being a series of alphabets represented by 20 characters and do not have a specific length. The main idea of this paper is to get an amino acid chain that contained encrypted message. To develop this model, we construct artificial lookup table to encrypt any character of message to amino acid chain, after that applying encryption process. The proposed model applied on different kinds and sizes of messages, which proved the success of the main idea of the research, which is obtaining amino acid chains with encrypted messages. The proposed model appears efficiency in real time of encryption and extraction process compared with known methods. In the end we compared the amino acids that we extract on the process of encrypting with internationally known amino acids and we found a similarity ratio, which proves that the proposed model is effective in terms of increasing ambiguity on the encrypted message.