A Secure keyword ordered multiuser searchable encryption framework

Recent trends in information technology have triggered the shift in various sectors from traditional methods of operation and data management to web based solutions. Cloud computing provides the best alternative, providing storage as a service and ensures efficient data operations. Data outsourcing reduces high cost and increases efficiency but it is vulnerable to leakage and manipulation hence rendering it unusable for most of the practical applications. Data encryption makes it safe but limits the scope for search and multiuser access. The model proposed supports efficient data encryption and search over the encrypted data by legitimate users and facilitates multiuser access to the data. Multiuser searchable encryption allows multiple users to access the data in both read and write mode with their distinct keys and facilitates addition and re-invocation of users with less overhead. The proposed scheme is based on encryption of data, keyword generation and search based on bilinear pairing. The system provides a proxy server which manipulates user queries making the system faster and more secure. The search is performed on keyword ordered list which makes the search faster as compared to the traditional methods of comparing trapdoor with keywords associated with the different files.