去中心化密钥管理属性基加密隐私保护模型

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中图分类号：TP309.2 文献标志码：A

Attribute-based Encryption Privacy Protection Model for Decentralized Key Management

ZHANG Xin-tao， XIE Xiao-feng，LU Xiu-qing （School of Computer Science and Technology，Qingdao University，Qingdao 266071，China）

Abstract： A decentralized key management and outsourced decryption privacy protection model for attribute-based encryption was proposed. Issues such as insecure centralized key management，heavy decryption computation burden on users，and inability to trace malicious users in traditional atribute-based encryption were addressed. The model combined attribute-based encryption and symmetric encryption to achieve fine-grained access control over data. Decryption operations were outsourced by leveraging computing nodes in the blockchain network，and the decryption computation burden on users was reduced. Secure multi-party computation technology was used to enable collaborative key generation and management. The blockchain public ledger was introduced to monitor and record user activities within the system，enabling full accountability in access control. Experimental result verifies that the scheme can protect user security and privacy while enabling secure data sharing.

Keywords： attribute-based encryption； blockchain； access control； secure multi-partycomputation

随着大数据和云计算技术的不断发展和应用，当今社会正逐步进入一个由数据驱动的新时代，大数据不仅改变了商业运作的模式，也深刻地影响着日常生活，并带来前所未有的便利[1]。（剩余10422字）