Reversible Logic Circuits for Crptyographic Model for Text Messages

With the rapid growth of digital communication systems and increasing concerns regarding data security, the demand for energy-efficient and reliable cryptographic techniques has become critical. Conventional cryptographic implementations based on irreversible logic circuits suffer from information loss, leading to higher power dissipation. Reversible logic offers an effective alternative by enabling computation without information loss, thereby reducing energy consumption and improving system efficiency. This paper presents a reversible logic-based cryptographic model for secure text message transmission. The proposed model utilizes fundamental reversible logic gates such as the Controlled NOT (CNOT) gate, Toffoli gate, and multi-controlled NOT (3-CNOT) gates to design fully reversible encryption and decryption circuits. Key-dependent operations including substitution, permutation, and XOR transformations are implemented using reversible logic, allowing secure and efficient conversion of plaintext into ciphertext. A major advantage of the proposed approach is the lossless recovery of the original text, achieved by reversing the encryption process using the same reversible circuitry. This ensures symmetric encryption while minimizing hardware complexity and power dissipation. Simulation results indicate that the proposed cryptographic model achieves effective encryption performance with low energy requirements, making it suitable for secure communication systems and low-power hardware applications.