Attribute-based Keyword Search And Data Access Control In Cloud

Cloud storage has been further researched and developed in recent years. It provides many conveniences to us such as data backup. As more and more private data is outsourced to cloud which is assumed to be a semi-trusted server. How to protect those personal data in cloud has been a big challenge for us. An effective way is to encrypt the sensitive data before stored in the cloud. However, it brings a series of problems, such as:How to search over the encrypted data efficiently and securely? How should a data owner grant search capabilities to the data users?To solve these problems, we propose two attribute-based keyword search and data access control schemes based on searchable encryption and attribute based encryption. Our solutions allow a data owner to control the access policy and grant the search policy to any data user who wants to retrieve the encrypted data efficiently.