Lattice-based Multi-Stage Secret Sharing 3D Secure Encryption Scheme

With the widespread deployment of three-dimensional (3D) models in industry and daily life, protecting the security of this data becomes crucial. Additionally, three-dimensional (3D) models may be distributed to users with varying security levels, necessitating distinct visualizations for each user. Recent research proposes 3D model encryption method that facilitates distinct visualizations post-decryption through hierarchical decryption. However, this method permits the decryption of 3D models at varying visual security levels based on user privileges. It has potential security vulnerabilities concerning key management and simultaneously limits its capacity to address diverse user requirements. To address this, a multi-stage secret sharing mechanism is integrated into the existing hierarchical encryption framework to bolster the security of hierarchical keys. When combined with lattice-based cryptography techniques, it ensures that only users with adequate shares can decrypt the corresponding 3D model hierarchy, achieving distinct visual effects while maintaining secret key security under diverse user needs. Experimental results demonstrate that the scheme effectively enhances security while maintaining data integrity and availability.