基于椭圆曲线密码的密文数据库密钥管理方案  

Key Management Scheme of Encrypted Database Based on Elliptic Curve Cryptography

作　　者：王超[1] WANG Chao(Nanyang Institute of Technology,Nanyang 473004,China)

机构地区：[1]南阳理工学院,河南南阳473004

出　　处：《中国电子科学研究院学报》2019年第2期177-183,共7页Journal of China Academy of Electronics and Information Technology

摘　　要：为进一步提升密文数据库密钥管理的安全性和效率,给出一种基于椭圆曲线密码的密文数据库密钥管理方案。所给方案中的用户均能够独立地选取各自的密钥,并将选取的密钥信息安全地传送到可信中心,可信中心根据用户密钥信息采用椭圆曲线密码计算具有偏序关系的用户关系参数,同时也给出在偏序关系变化后的密文数据库更新方法。所给方案中的高级别用户能根据用户关系参数及用户密钥安全高效地推导出低级别用户的密钥信息,然后可以使用推导出的密钥信息解密低级别用户的密文数据库。性能分析结果表明:所给方案可以有效抵抗反向攻击、内部收集攻击、外部收集攻击、密文统计攻击等,而且与其它经典方案相比所需空间开销和时间开销更小。In order to further improve the security and efficiency of the key management of encrypted database,a key management scheme of encrypted database based on elliptic curve cryptography is presented.The user in the presented scheme can select their own key independently,and transfer the selected key information to the trusted center securely.The trusted center adopts the elliptic curve cryptography to calculate the relation parameters of user with the partial order relation according to the key information of user,and the update method of encrypted database is also proposed after the change of partial order relation.The high level user can derive the key information of low level user securely and efficiently in line with the relation parameters and key of the user,then the derived key information is used to decrypt the encrypted database of the low level user.The performance analysis results show that the proposed scheme can resist reverse attack,internal collection attack,external collection attack and ciphertext statistics attack and so on,and the space overhead and the time overhead is less by comparing with other classic schemes.

关 键 词：密文数据库 密钥管理 椭圆曲线密码 等级访问控制 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]