Most of the existing signcryption schemes generate pseudonym by key generation center (KGC) and usually choose bilinear pairing to construct authentication schemes. The drawback is that these schemes not only consume heavy computation and communication costs during information exchange, but also can not eliminate security risks due to not updating pseudonym, which do not work well for resource-constrained smart terminals in cyber-physical power systems (CPPSs). The main objective of this paper is to propose a novel efficient signcryption scheme for resource-constrained smart terminals. First, a dynamical pseudonym self-generation mechanism (DPSGM) is explored to achieve privacy preservation and avoid the source being linked. Second, combined with DPSGM, an efficient signcryption scheme based on certificateless cryptography (CLC) and elliptic curve cryptography (ECC) is designed, which reduces importantly computation and communication burden. Furthermore, under random oracle model (ROM), the confidentiality and non-repudiation of the proposed signcryption scheme are transformed into elliptic curve discrete logarithm and computational Diffie-Hellman problems that cannot be solved in polynomial time, which guarantees the security. Finally, the effectiveness and feasibility of the proposed signcryption scheme are confirmed by experimental analyses.

翻译：现有的大多数签密方案通过密钥生成中心（KGC）生成假名，并通常选用双线性对来构建认证方案。其缺点在于，这些方案不仅导致信息交互过程中计算与通信开销过大，而且因无法更新假名而难以消除安全隐患，难以适用于信息物理电力系统（CPPSs）中资源受限的智能终端。本文的主要目标是提出一种面向资源受限智能终端的高效新型签密方案。首先，探索了一种动态假名自生成机制（DPSGM），以实现隐私保护并避免信源关联性。其次，结合DPSGM设计了一种基于无证书密码学（CLC）和椭圆曲线密码学（ECC）的高效签密方案，显著降低了计算与通信负担。此外，在随机预言机模型（ROM）下，所提签密方案的机密性与不可否认性被归约为多项式时间内不可解的椭圆曲线离散对数问题和计算性Diffie-Hellman问题，从而保证了安全性。最后，通过实验分析验证了所提签密方案的有效性与可行性。