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Hybrid Cryptography DNA-Based Vigenère Cipher for Secure File Encryption

1st Dr.A. Karunamurthy , 2nd S Sathiyaraj*1

1Associate Professor, Department of computer Applications, Sri Manakula Vinayagar Engineering College (Autonomous), Puducherry 605008, India,

Karunamurthy26@gmail.com

2Post Graduate student, Department of computer Applications, Sri Manakula Vinayagar Engineering College (Autonomous), Puducherry 605008, India

Sathiyaraj.glacc@gmail.com

Abstract

This project introduces an innovative web application that integrates DNA-based cryptography with the Vigenère cipher to ensure secure file encryption and decryption. The encryption process begins with converting text content into its binary representation, which is then transformed into a corresponding DNA sequence. The DNA sequence is further mapped into protein sequences using the standard amino acid codon table. To enhance security, the protein sequence undergoes encryption using the Vigenère cipher, with a user-provided encryption key. The resultant encrypted message is securely stored in a MySQL database. The decryption functionality is designed for user convenience and security. The web application provides an interface listing all encrypted files stored on the server. Users can download and decrypt the files using the same key employed during encryption. The decryption process restores the encrypted message to its original text form and reverts the data into its original file format. This project showcases the potential of combining bio-inspired cryptographic techniques with classical encryption algorithms to achieve robust data protection. By leveraging JavaScript for implementation, the system ensures accessibility and compatibility across platforms, making it a practical solution for secure file storage and transfer.

Keywords: DNA-based encryption, Hybrid cryptography, Amino acid translation,   Bio-inspired cryptography, DNA-to-binary mapping, Polyalphabetic substitution, Cryptographic security.