基于多碱基组合映射编码和DNA计算的一次一密算法

为增强密码方案安全性，利用多碱基组合映射编码，采用模拟DNA生物操作的方式，提出了一种一次一密加解密方案。方案主要采用分段加密的机制，利用多碱基组合映射编码规则编码明文信息，通过Logistic逻辑映射系统生成随机数构造一次一密密钥本，为每一个明文段选择不同的密钥。加解密算法运用DNA碱基运算规则，并将部分参数和最终密文经过处理后通过安全信道传送给解密方。对图像的仿真和安全性的分析表明，密钥本的制作基于混沌映射和多碱基DNA编码规则两层操作，密钥空间足够大，并且攻击者在密文图像中得不到任何有用的统计数据，另外，随着需要加密的明文数据量增加，攻击者完全破解所需计算的密钥空间量呈指数级增长，增强了算法安全性。

One-time-pad encryption scheme based on multibase combination mapping encoding and DNA computing

In order to enhance the security of cryptographic scheme, using the multibase combination mapping encoding and the way of simulating the biological operation, a one-time-pad encryption scheme was proposed. The scheme mainly adopted the mechanism of segmentation encryption. The plaintext information was transformed into the DNA sequence by the multibase combination mapping encoding. The Logistic Logic Mapping System generated random numbers to construct a one-time-pad codebook and selected different key for each plaintext segment. The encryption/decryption algorithm used the DNA base algorithm and transmitted some of the parameters and the final ciphertext to the decryption side through a secure channel. Through the analysis of the simulation and security of the image emulation, it is shown that the production of the codebook is based on the two-level operation: the chaos mapping and the multibase combination mapping encoding, the key space is large enough, and the attacker can not obtain any useful statistical date in the ciphertext image. Moreover, with the increase of the plaintext data, the amount of key space required for the attacker to crack is exponentially increasing, which improves the security of the algorithm.