A Topology-Aware Authenticated Encryption Transformation for 3D Meshes

Secure transmission and integrity protection of 3D mesh signals are essential in multimedia, virtual reality, and cloud-based rendering applications. Existing 3D mesh encryption methods mainly focus on geometric confidentiality, while largely neglecting the critical role of mesh topology in authentication and tamper detection. In this letter, a topology-aware authenticated encryption transformation for 3D meshes is proposed. Vertex coordinates are encrypted using AES-CFB to ensure geometric confidentiality, while 3D mesh connectivity information is incorporated into a GMAC-based authentication process to enable topology-aware integrity verification. Any modification to geometry or topology can be reliably detected during the decryption process. Experiments demonstrate near-lossless reconstruction with errors on the order of$10^{-8}$and a 100% detection rate against ciphertext and topology tampering.