An Efficient Privacy-Preserving Search System Over Encrypted Cloud Data

Abstract

As cloud computing becomes prevalent, more and more sensitive information are being centralized into the cloud. For the protection of data privacy, sensitive data usually have to be encrypted before outsourcing, which makes effective data utilization a very challenging task. Existing techniques are focusing on multi-keyword exact match or single keyword fuzzy search. Wang’s scheme was only effective for a one letter mistake in keyword but was not effective for other common spelling mistake. We propose an efficient multi-keyword ranked search scheme based on wang et al’s scheme. We develop a new method of keyword transformation based on the uni-gram, which will simultaneously improve the accuracy rate and ability to handle spelling mistakes.