The information security has an irreplaceable position in the smart grid (SG). In order to avoid the malicious attack and ensure the information security, the cryptographic techniques are essential. This paper focuses on the encryption techniques to ensure the information security of SG. Firstly, an unusual 7-dimensional complex chaotic system (7D-CCS) combined with the cubic memristor is introduced. Besides its phase portraits, Lyapunov exponent, 0-1 test, complexity, and bifurcation diagram are investigated. Then, with the proposed 7D-CCS, we design a data encryption algorithm to ensure the encryption security. Finally, the data and monitoring images in SG are encrypted by the designed encryption scheme. Besides, the encryption performance is given in detailed. The experimental results show that the proposed encryption scheme has quite good encryption performance. Therefore, it can ensure the information security of SG.

翻译：信息安全在智能网格中具有不可替代的地位。为了避免恶意攻击和确保信息安全,加密技术至关重要。本文件侧重于加密技术,以确保SG的信息安全。首先,引入了一种不寻常的七维复杂混乱系统(7D-CCS),加上立体存储器。除了其相片外,还调查了Lyapunov exponent、0-1测试、复杂度和双向图。然后,在拟议的7D-CCS中,我们设计了数据加密算法,以确保加密安全。最后,SG中的数据和监测图像由设计的加密办法加密。此外,加密性能也作了详细介绍。实验结果显示,拟议的加密办法具有相当好的加密性能。因此,它可以确保SG的信息安全。