智能电网下保护用户隐私的无证书环签密方案

针对智能电网通过智能终端实时采集用户用电信息以实现预测和调度等功能,但频繁的数据采集不可避免地涉及用户敏感信息泄露的问题,提出了一种保护用户隐私的新的无证书环签密方案,该算法摒弃了计算开销大的双线性对运算和指数运算,仅使用椭圆曲线上的模乘运算。安全性分析证明,该方案满足无条件匿名性、保密性和不可伪造性。实验结果显示,与现有方案相比,该方案具有更低的计算开销,适合复杂、高效的智能电网。

Certificateless Ring Signcryption Scheme for Preserving User Privacy in Smart Grid

Aiming at the sensitive information leakage problem when the intelligent terminals collecting users'' electricity information frequently in smart grid to achieve the forecast and scheduling functions, a novel certificateless ring signcryption scheme is proposed to preserve the users'' privacy. The new scheme eliminates the computational cost of bilinear pairing and exponentiation by using the modular multiplication on elliptic curves. The security analysis proves that this scheme can satisfy the unconditional anonymity, confidentiality and unforgeability. The experimental result shows that the proposed scheme has the lower computational overhead and is more suitable for complex and efficient smart grid comparing with the existing schemes.