多域物联网中基于区块链技术的网络安全控制研究

Research on network security control based on blockchain technology in multi-domain Internet of Things

物联网应用越来越广泛,但具有网络安全性差、易受到网络攻击的隐患,为保证多域物联网的安全,基于区块链技术对多域物联网的网络安全控制系统进行了设计。该物联网安全系统采用区块链技术建立,主要包括用户和设备层、身份认证层和服务层。对指纹感知语音的身份认证方式进行了设计,采用哈希算法进行指纹图像的特征识别、提取哈希值,为了提高安全性,将指纹图像采用数字水印的方式嵌入语音中。对明文的加密和解密方式进行了设计,采用SM2算法(椭圆曲线公钥密码算法)分别进行随机数生成、密钥派生函数和杂凑算法的计算。为验证物联网安全系统的性能,对其进行指纹图像身份认证的安全性和明文加密性能测试。试验结果表明:该系统人员身份的识别正确率可以达到90%以上,保证身份认证的安全;系统可以对文件进行加密,与RSA算法(非对称加密算法)相比运算速度提高23%、吞吐率提高4.7%。

The Internet of things was more and more widely used,but it has the potential of poor network security and being vulnerable to network attacks.To ensure the security of multi-domain Internet of things,the network security control system of multi-domain Internet of things based on blockchain technology was designed.The security system was built using blockchain technology and mainly includes user and device layer,identity authentication layer and service layer.The identity authentication method of fingerprint sensing speech was designed,and the hash algorithm was used to recognize the feature of the fingerprint image and extract the hash value.To improve the security,the fingerprint image was embedded in the speech by digital watermark.The plaintext encryption and decryption methods were designed,and SM2 algorithm was used to generate random number,key derived function and hash algorithm respectively.To verify the performance of the security system of the Internet of thins,the security of fingerprint image identity authentication and plaintext encryption performance were tested.The test results show that the system could realize the identity identification of personnel and ensure the security of identity authentication,recognition accuracy reaches 90.The system could encrypt files with better performance,compared with RSA algorithm,the operation speed was increased by 23%,and the throughput was increase by 4.7%.