一种基于超混沌系统的加密算法及其在预制舱变电站的应用

An Encryption Algorithm Based on Hyperchaotic System and Its Application in Prefabricated Cabin Substation

针对预制舱变电站技术中潜在的信息安全问题,提出了一种基于超混沌系统的加密算法。算法采用公钥加密协议,适用于多对一、多对多的电网信息交互模式。首先由素数发生器生成素数,利用素数确定加密系统的公钥和私钥;接着对公钥和私钥进行归一化处理,使其数值在混沌序列初值区间内;然后利用超混沌系统生成序列的高随机性进行掩膜、扩散等加密操作,并发送密文至接收端;最后在接收端通过正确密钥解密获得有效明文。实验结果和分析表明,该算法具有密钥空间大、密钥敏感性强、抵抗差分攻击性能强等优点。

Aiming at the potential information security problems in prefabricated cabin substation technology,an encryption algorithm based on hyperchaotic system is proposed.The algorithm adopts public key encryption protocol,which is suitable for many to one and many to many power grid information interaction modes.Firstly,the prime generator generates the prime number,and uses the prime number to determine the public key and private key of the encryption system.Secondly,the public key and private key are normalized to make their values within the initial value interval of chaotic sequence.Thirdly,the high randomness of the generated sequence of hyperchaotic system is used for encryption operations such as mask and diffusion,and the ciphertext is sent to the receiver.Finally,the valid plaintext is obtained by decrypting the correct key at the receiver.Experimental results and analysis show that the algorithm has the advantages of large key space,strong key sensitivity and high resistance to differential attacks.