A Lattice-Based Single-Domain DAA Protocol for Smart Grid Scenarios

The authentication of identities within the smart grid system is crucial for ensuring its security and stable operation. With the emergence of smart grid technology, the significance of identity authentication in smart grid systems has become increasingly evident. Traditional authentication techniques, such as Direct Anonymous Attestation (DAA) based on RSA or ECC algorithm, face threats from quantum computing. On the other hand, lattice-based cryptography utilizes lattice structures and difficult problems to ensure the security and reliability of authentication against quantum computing threats, leading to the development of various Lattice-based Direct Anonymous Attestation (LDAA) protocols. In traditional LDAA schemes, the signature process involves using issued identity certificates to ensure trustworthiness. To maintain identity anonymity and trust, this process usually requires an additional commitment scheme and the use of large coefficient expressions for zero-knowledge proofs. This paper presents a single-domain LDAA scheme based on lattice cryptography. It significantly enhances authentication efficiency and performance by employing an innovative multiplication relations proof mechanism in lattices. Comparative experimental results validate the superiority of the proposed scheme.