数字签密技术在智能电网中的应用

为了减少智能电网安全体系中的数字证书存储空间和计算开销,提高加密与签名的耦合度,在分析智能电网数据传输中的安全性的基础上,提出智能电网与无证书数字签密体制间角色的映射方法,构建智能电网无证书签密应用环境,并以椭圆曲线密码为基础,设计一种面向智能电网的数字签密安全方案。智能电网通信中引入的可信第三方与智能节点共同产生的密钥对,提高了通信的安全性,将加密过程融入签名过程中,提高了通信的传输效率。与智能电网现有密码算法在安全上相比,该方案具有消息的保密性、完整性、抗否认性和抗伪造型等特点。经应用场景测试,该方案可以满足智能电网数据传输的时间需求。

Application of Certificateless Signcryption Scheme to Smart Grids

In order to reduce storage space and computational cost of the digital certificate security system in smart grids and increase the coupling degree of encryption and signature, the mapping method of smart grid and certificateless signcryption scheme of role is put forward, and the application environment of certificateless signcryption on smart grids is constructed, which is based on the analyses of security of data transmission in smart grid. By using the elliptic curve cryptography, a digital signcryption scheme for smart grids is developed. In order to improve the communication security, the trusted third party is introduced into communication of the smart grid. Combined with the intelligent nodes, a key pair is produced. By taking encryption process into the signing process, this method improves the transmission efficiency of communication. Compared with the security of the existing algorithms, the proposed scheme has the advantages on confidentiality, integrity, nonrepudiation and antiforgery. The application test results show that the scheme can meet the requirements of real-time data transmission in smart grids.