摘要
针对分布式环境下数据库加密密钥管理问题 ,分析了密钥管理的特点 ,提出了一种基于矩阵模型的密钥转换表方案 ,并严格论证了其安全性 .矩阵中存储的都是密文 ,敌手不能从中得到有用的信息或推导 .系统能够根据用户的数据库访问请求 ,进行密钥变换 ,从而安全高效地响应用户的请求 .另外 ,此方案既能够提供各个子数据库系统之间一定程度的数据共享 ,又能够保持各自的独立性 .
Aimed at the problems of key management of database encryption in distributed environment, some characteristics of this problem are analyzed, a new scheme based on the model of conversion matrix is raised, and its security is strictly demonstrated. The element of matrix is stored in cryptograph; the rival can′t get any useful information or achieve any favorable inference from the matrix. When an authorized user requests database access, the system will take a series of complex transaction of key by using the element of matrix, securely and highly efficient response for the request is provided. This scheme can not only provide share of data among many distributed subsystems to some extent, but also ensure their independence.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2002年第4期43-45,共3页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
关键词
数据库加密
密钥管理
安全性
分布式环境
加密
database encryption
distributed environment
key management
security
