期刊名称：International Journal of Innovative Research in Computer and Communication Engineering
印刷版ISSN：2320-9798
电子版ISSN：2320-9801
出版年度：2017
卷号：5
期号：2
页码：1928
DOI：10.15680/IJIRCCE.2017.0502157
出版社：S&S Publications
摘要：In the cloudenvironment, the data owners could uses attribute-based encryption to encrypt the storeddata which accomplishing access control and data security. To reduce the cost, the users which have a limitedcomputing power are nevertheless more likely to delegate the mask of the decryption task to the cloud servers. Theresult shows, attribute-based encryption with delegation come out. Still, there are some problems and questionsregarding to previous related works. For example, during the delegation or release, the cloud servers could misrepresentor replace the delegated cipher text and respond a fake result with malevolent intent. As well as for the purpose of costsaving the cloud server may also fraud the eligible users by responding them that they are unworthy. Even, the accesspolicies may not be flexible during the encryption. Since policy for general circuits are used to achieve the strongestform of access control, a construction to design circuit cipher text-policy attribute-based encryption with time-specifiedattributes scheme has been developed.. In this scheme, every cipher text is labeled with some attribute and a timeinterval while private key is associated with a time instant. The cipher text can only be decrypted if both the timeinstant is in the allowed time interval and the attributes associated with the cipher text satisfy the key’s accessstructure.This system is mixed with verifiable computation the dataconfidentiality, the fine-grained access control aswell as the correctness of the delegated computing results are well guaranteed at the same time. Moreover, this schemeachieves feasibility as well as efficiency.
