• Proposes a dynamic group signature-based cross-chain identity authentication approach to mitigate privacy leakage and identity island problems in smart education.
• Achieves anti-quantum security under LWE and ISIS assumptions, ensuring long-term cryptographic robustness.
• Utilizes non-interactive zero-knowledge proof (NIZKP) to protect user identity privacy during cross-chain interactions.
• Demonstrates low computational overhead, making it suitable for practical cross-chain authentication in heterogeneous consortium blockchains.