부산대학교 도서관

The rapid development of quantum computing challenges the security of classical cryptographic regimes, and Direct Anonymous Attestation (DAA), a protocol built on RSA or ECC, widely used in the Internet of Things, cannot achieve post-quantum security. This has given rise to a variety of lattice-based direct anonymous protocols (LDAA). This paper proposes a cross-domain lattice-based DAA to address the need for cross-domain authentication in the IoT. The CD-LDAA protocol is based on the traditional DAA cross-domain protocol and introduces trusted third-party institutions and designs lattice-based TA-Join, Issuer B -Join, and CD-Sign/Verify protocols. Secondly, the security of CD-LDAA is demonstrated based on a generic composable security framework with improved CD-LDAA ideal functions. Finally, the execution time of the CD-LDAA protocol and the size of the generated visa certificate and cross-domain certificate are tested through simulation experiments. The results show that the scheme proposed in this paper is higher than the traditional ECC or RSA-based DAA cross-domain protocols in terms of computation and storage consumption, but the post-quantum security strength is higher.