The technology known as Block Chain is one of the technologies that is seeing one of the fastest increase rates around the world. The technique known as blockchain is used to guarantee the security of a variety of data places, despite the fact that customers are not familiar with it. “ChaCha” and “RBJ25” are the names of the algorithms that the user in question continues to utilize, which are considered to be of a lower degree of security. Within the scope of this investigation, the RPBB-24-2 security technique is the one that is being presented. There are two components that are incorporated in the RPBB-24-2 method. These components include encryption and decryption. The RPBB-24-2 methodology has 4 processes. The 1st process is to assign the “Latin Alphabet code” to PT. The 2nd process is to multiply the 4 times using Eq. (1). The 3rd process is to swap the cell values using Encrypted data but start the 0th cell value from upper triangle cell value. The 4th process is to apply the “ChaCha” method in matrix. Finally, the plain text is converted to cipher text. This means that the procedure of decryption is the opposite of the encryption approach. When compared to the approach that is currently in use, the suggested method offers a higher level of security. © 2025 Elsevier B.V., All rights reserved.