Lot of techniques and systems has been developed based on modular arithmetic cryptography for encryption and decryption. However, these techniques are broken using DNA cryptography techniques and methods. DNA Cryptography is a new instinctive cryptographic field that has emerged from the research of DNA computing. Some algorithms that are available in DNA Cryptography have limitations in that they still use modular arithmetic cryptography at some of their steps or they are biological laboratory experiment based which is not suitable in the digital computing environment. To overcome this lacuna, we describe a novel, secure, unique and dynamic DNA based encryption and decryption algorithm and also provide an analysis of its performance.
DNA Cryptography is a rapidly emerging field of DNA Computing research to provide invincible cryptographic technique for the modern cyber world of today and the futuristic DNA computers. Several DNA based cryptographic algorithms are proposed for encryption, decryption and authentication, etc. The first and foremost step of DNA based encryption is DNA encoding of plaintext. The main limitation of DNA encoding is the absence of effective, randomized, dynamic, secure DNA Encoding technique for DNA encoding of plaintext. To overcome this limitation, this paper describes a novel DNA encoding algorithm. This encoding algorithm is based on a novel string matrix data structure, for generating the unique DNA sequences that can be used to encode plain text (comprising of alphabets, numbers and special characters) as DNA sequences. The experimental results and comparison results have proved that the proposed DNA encoding algorithm is more effective than the existing DNA encoding algorithms.
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