Design and Application of a Decentralized School Community Forum Based on Cryptography and Blockchain Technologies

Abstract

Traditional campus forums commonly suffer from three intrinsic tensions: privacy leakage risks that suppress free expression, a lack of incentive mechanisms that leads to low-quality content, and centralized administrative control that undermines community autonomy. To systematically address these issues, this study proposes and designs a decentralized school community forum that integrates advanced cryptographic techniques with blockchain technology. The core contribution lies in constructing a “verifiable anonymity” identity authentication system, in which zk-SNARKs ensure privacy-preserving verification of student status. Furthermore, a dynamic token-incentive model (EduToken) based on game-theoretic Shapley values is devised to fairly quantify collaborative contributions and stimulate community engagement. Meanwhile, a DAO governance framework combined with Ciphertext-Policy Attribute-Based Encryption (CP-ABE) enables GDPRcompliant fine-grained access control and community self-organization. Through theoretical analysis, prototype system development, and experimental validation, the proposed solution demonstrates significant advantages in protecting user privacy, establishing a sustainable incentive ecosystem, and ensuring data sovereignty. This research provides an innovative technical framework and a feasible pathway toward secure, vibrant, and regulation-compliant academic communication communities.