Lattice-Based Anonymous Signcryption For Smart Grid

Smart grid utilizes intelligent metering devices that transmit the energy usage data of an end user to a service provider. During the transmission’ an adversary could eavesdrop’ intercept’ modify and forge the data. Therefore’ it is critically important to make sure that such data is confidential and unforgeable. Signcryption is an effective technique to satisfy the requirements. However’ existing signcryption schemes are generally based on conventional hardness assumptions’ which are vulnerable to adversaries equipped with quantum computers in the near future. Additionally, they fail to consider identity leakage that allows an adversary to target a special end-user group of smart grid for attacks. To solve the problems’ an anonymous signcryption scheme for smart grid, dubbed AS4Smd, is proposed. AS4Smd is based on lattice cryptography’ which is post-quantum secure. In AS4Smd’ an end-user can sign and encrypt data in a logically single step to produce a signcryptext. Additionally’ the end-user’s identity is embedded in the signcryptext to accomplish end-user anonymity. The performance evaluation on AS4Smd shows that it is efficient in terms of computation and communication efficiency.