南京理工大学学报（自然科学版）2017，Vol.41Issue(4)：412-419,8.DOI:10.14177/j.cnki.32-1397n.2017.41.04.003
密文数据库中支持快速密钥更新的数据共享方案
Data sharing scheme supporting fast key updatingin the encrypted database
摘要
Abstract
Attribute-based encryption(ABE)is an optimal choice for one-to-many data sharing in the cloud environment,and is not very efficient when data owner updates the content key dynamically.In order to solve this problem,data sharing scheme supporting fast key updating in the encrypted database is proposed.In the scheme,the data owner encrypts the data key with attribute-based encryption mechanism.In addition,re-encryption mechanism is used to support the rapid updating of the data key.In this way,it can reduce the user and server workload and improve system security.The scheme is secure against chosen plaintext attack under the decision bilinear Diffie-Hellman(DBDH)assumption in the standard model.Compared with other schemes,the length of the attribute keys and ciphertext are optimized in the scheme.The cost of data sharing and accessing is reduced,which is more suitable for the practical application of cloud environment.关键词
密文数据库/属性基加密/数据共享/密钥更新Key words
encrypted database/attribute-based encryption/data share/data updating分类
信息技术与安全科学引用本文复制引用
闫玺玺,胡前伟,李子臣,汤永利..密文数据库中支持快速密钥更新的数据共享方案[J].南京理工大学学报（自然科学版）,2017,41(4):412-419,8.基金项目
国家自然科学基金(61300216) （61300216）
河南省科技厅项目(132102210123) （132102210123）
河南省教育厅科研项目(16A520013) （16A520013）
河南理工大学2015年青年骨干教师资助项目 （）
