RC4 Algorithm and Steganography to Double Secure Messages in Digital Image

Human life today, we know that the security of information is an important thing. Cryptography and Steganography help us to keep our information secure. If someone finds out the unknown message we known as ciphertext, they will crack it, and it's the weakness of the cryptography itself. Combining the RC4 Algorithm and LSB Cryptography will solve that problem. So, we can keep the confidentiality in the messages, the messages that can maintain the security, and the secret of the messages simultaneously. In this research, we use the time process of encryption and decryption as a parameter, and we also compare the Stego image based on BITMAP and JPEG format. The result of the Stego image in the BITMAP format shows us that this method is better than the Stego image in JPEG format.