The amount of data to be communicated through social media like facebook, twitter, instagram, whatsapp, and etc. These social media data used to analyzed the prediction of future any products. This prediction data has security less, So, D.J. Bernstein introduced the Salsa method for security purpose. But this method contribute only speed of encryption only. In this paper, a novel method is RB24 method. This method has three stages. In the first stage, to create secret key and multiply the key. In the second stage, to swap the prime numbers and non negative integer in given matrix. In the third stage, to swap the M pair numbers. Finally, the proposed method RB24 provide very good security when compared with Salsa method. © 2021 Elsevier B.V., All rights reserved.