基于超混沌序列改进分组密码算法的无线传感网络通信数据加密方法

Data Encryption Method for Wireless Sensor Network Communication Based on Hyperchaotic Sequence Improved Block Cipher Algorithm

为保障无线传感网络通信数据安全、提升无线传感网络抗攻击性,研究了基于超混沌序列改进分组密码算法的无线传感网络通信数据加密方法。基于二维离散超混沌序列生成二进制密钥流,进行非线性变换得到二进制流,利用二进制密钥流完成无线传感网络通信数据加密。将超混沌序列生成的密钥流作为IDEA分组密码算法的初始密钥,改进IDEA分组密码算法,输出各组无线传感网络通信数据密文。试验结果表明,加密后不同字符ASCII统计概率为0.0039左右,说明所提方法所生成的密文中字符平衡性较好,可有效实现无线传感网络通信数据加密目的,并能成功抵抗字符频率统计与信息熵等不同类型攻击。

In order to ensure the security of wireless sensor network communication data and improve the anti-attack capability of wireless sensor network,an encryption method of wireless sensor network communication data based on hyperchaotic sequence improved block cipher algorithm was studied.A binary key stream was generated based on a two-dimensional discrete hyperchaotic sequence for performing nonlinear transformation to obtain the binary stream,and then used to complete wireless sensor network communication data encryption.The key stream obtained by means of hyperchaotic sequence was employed as the initial key of IDEA block cipher algorithm,and the algorithm was improved to output each group of wireless sensor network communication data ciphertext.The experimental results show that the ASCII statistical probability of different characters after encryption is about 0.0039,which indicates that the character balance in the ciphertext generated by the proposed method is good,which can effectively achieve the purpose of wireless sensor network communication data encryption,and can successfully resist different types of attacks such as character frequency statistics and information entropy.