摘要
随着云计算技术的迅猛发展，数据存储与访问模式发生深刻变革，传统数据库安全机制面临诸多挑战。本研究聚焦于构建面向云计算环境的数据库安全访问控制模型，旨在解决云环境下多租户数据隔离、细粒度权限管理及动态访问控制等关键问题。通过分析现有访问控制理论与云计算特性，提出一种融合属性基加密和角色基访问控制的混合模型，该模型不仅实现了数据静态存储加密保护，还支持基于用户属性和角色的动态访问授权。创新性地引入上下文感知机制，使访问决策能够根据实时环境变化进行调整，增强系统灵活性与安全性。实验结果表明，所提模型在保证高效性能的同时，显著提升了数据的安全性和访问控制的精准度。通过对实际应用场景的模拟测试，验证了该模型在大规模并发访问场景下的稳定性和可靠性，为云计算环境下的数据库安全管理提供了新的思路和技术手段，对推动云服务安全体系的发展具有重要意义。
关键词：云计算安全；数据库访问控制；属性基加密
Abstract
With the rapid development of cloud computing technology, data storage and access patterns have undergone profound transformations, posing significant challenges to traditional database security mechanisms. This study focuses on constructing a database security access control model tailored for cloud computing environments, addressing critical issues such as multi-tenant data isolation, fine-grained permission management, and dynamic access control. By analyzing existing access control theories and the characteristics of cloud computing, this research proposes a hybrid model that integrates attribute-based encryption and role-based access control. This model not only achieves static encryption protection for data at rest but also supports dynamic access authorization based on user attributes and roles. Innovatively, a context-aware mechanism is introduced, enabling access decisions to be adjusted according to real-time environmental changes, thereby enhancing system flexibility and security. Experimental results demonstrate that the proposed model significantly improves data security and the precision of access control while maintaining high performance efficiency. Simulation tests in practical application scenarios verify the stability and reliability of this model under large-scale concurrent access conditions, providing new insights and technical approaches for database security management in cloud computing environments, which is of great significance for advancing the development of cloud service security systems.
Keywords：Cloud Computing Security; Database Access Control; Attribute-Based Encryption
目 录
摘要 I
Abstract II
一、绪论 1
(一) 研究背景与意义 1
(二) 国内外研究现状 1
(三) 研究方法与技术路线 2
二、云计算环境下的安全需求分析 2
(一) 云计算架构概述 2
(二) 数据库安全威胁分析 3
(三) 安全访问控制需求 4
三、面向云计算的访问控制模型设计 4
(一) 模型架构设计原则 4
(二) 关键技术选择与实现 5
(三) 模型功能模块划分 6
四、访问控制模型的安全性评估 7
(一) 安全性评估指标体系 7
(二) 模型性能测试分析 7
(三) 安全性改进措施探讨 8
结 论 10
参考文献 11
随着云计算技术的迅猛发展，数据存储与访问模式发生深刻变革，传统数据库安全机制面临诸多挑战。本研究聚焦于构建面向云计算环境的数据库安全访问控制模型，旨在解决云环境下多租户数据隔离、细粒度权限管理及动态访问控制等关键问题。通过分析现有访问控制理论与云计算特性，提出一种融合属性基加密和角色基访问控制的混合模型，该模型不仅实现了数据静态存储加密保护，还支持基于用户属性和角色的动态访问授权。创新性地引入上下文感知机制，使访问决策能够根据实时环境变化进行调整，增强系统灵活性与安全性。实验结果表明，所提模型在保证高效性能的同时，显著提升了数据的安全性和访问控制的精准度。通过对实际应用场景的模拟测试，验证了该模型在大规模并发访问场景下的稳定性和可靠性，为云计算环境下的数据库安全管理提供了新的思路和技术手段，对推动云服务安全体系的发展具有重要意义。
关键词：云计算安全；数据库访问控制；属性基加密
Abstract
With the rapid development of cloud computing technology, data storage and access patterns have undergone profound transformations, posing significant challenges to traditional database security mechanisms. This study focuses on constructing a database security access control model tailored for cloud computing environments, addressing critical issues such as multi-tenant data isolation, fine-grained permission management, and dynamic access control. By analyzing existing access control theories and the characteristics of cloud computing, this research proposes a hybrid model that integrates attribute-based encryption and role-based access control. This model not only achieves static encryption protection for data at rest but also supports dynamic access authorization based on user attributes and roles. Innovatively, a context-aware mechanism is introduced, enabling access decisions to be adjusted according to real-time environmental changes, thereby enhancing system flexibility and security. Experimental results demonstrate that the proposed model significantly improves data security and the precision of access control while maintaining high performance efficiency. Simulation tests in practical application scenarios verify the stability and reliability of this model under large-scale concurrent access conditions, providing new insights and technical approaches for database security management in cloud computing environments, which is of great significance for advancing the development of cloud service security systems.
Keywords：Cloud Computing Security; Database Access Control; Attribute-Based Encryption
目 录
摘要 I
Abstract II
一、绪论 1
(一) 研究背景与意义 1
(二) 国内外研究现状 1
(三) 研究方法与技术路线 2
二、云计算环境下的安全需求分析 2
(一) 云计算架构概述 2
(二) 数据库安全威胁分析 3
(三) 安全访问控制需求 4
三、面向云计算的访问控制模型设计 4
(一) 模型架构设计原则 4
(二) 关键技术选择与实现 5
(三) 模型功能模块划分 6
四、访问控制模型的安全性评估 7
(一) 安全性评估指标体系 7
(二) 模型性能测试分析 7
(三) 安全性改进措施探讨 8
结 论 10
参考文献 11
