DNA Password System Based On DNA Computing

As an interdisciplinary subject of biology and mathematics, DNA calculation has become a new solution to NP problems and got considerable attention as well as fast development, after its birth as a successful settlement of Hamiltonian path problem (HPP). Cryptology is a tool used to ensure data security. It has developed for more than2000years since the earliest record. Now it has perfect theoretical basis and wide application. This article combines DNA calculation with cryptology, introducing the new field in cryptology-DNA password.DNA password uses technical means from molecular biology such as DNA combination, PCR, and DNA digital coding to find DNA’s advantages in calculation concurrency、huge storage、 low consumption、rich resources. Besides, because DNA cryptology bases its security on both biological and mathematical problems, which is different from Nondeterministic Polynomial of traditional cryptology and modern cryptology, quantum physics of quantum password, DNA password system is decoding-proof and unbreakable. This is the double security for DNA password.This paper analyzes the classical models of and traditional password, modern password, quantum password. Then by comparing their basic conception, theoretical basis, operation process, security basis and development with that of DNA password, this article find the advantages and disadvantages of DNA password. Also, key generation and distribution, encryption, decryption will be discussed in detail in this article. Finally, a new design project which combines traditional password with quantum password will be put forward to produce a new kind password system that can be used in resident identity management system and so on.