Transposition Cipher as a Solution for a Better Bank Verification Number (BVN) Security in Communication Channel

Abstract

BVN stands for Bank Verification Number, which is a biometric identification used in Nigeria to verify identity of bank customers, a transposition cipher is an encryption method that recognizes data sent via a communication channel in such a way, no one but the intended receiver can understand the original message. As we increasingly rely on digital channels to share and store information, it becomes crucial to prioritize information security to safeguard against unauthorized access, data breaches and cyber threats. This paper explores the principles, goals and intended outcomes of utilizing transposition ciphers as a data security measure, shedding light on its applications and benefits in protecting digital information. The data will be encrypted in two phases, in phase I, the stack method will be used and in phase II, the transposition will be applied on the data in phase I, the transposition is by using a newly constructed algebraic structure (Gp) which makes encryption and decryption possible using mathematical functions before sending the data over the communication channels, the resulted ciphertext after applying the transposition is more complex for the intruders but very simple for the intended receiver to decrypt, and the method that will be adopted is the construction of a function that can allow encryption and decryption of the data.