2134/26122 Shahzaib Tahir Shahzaib Tahir Sushmita Ruj Sushmita Ruj Yogachandran Rahulamathavan Yogachandran Rahulamathavan Muttukrishnan Rajarajan Muttukrishnan Rajarajan Cornelius Glackin Cornelius Glackin A new secure and lightweight searchable encryption scheme over encrypted cloud data Loughborough University 2017 Searchable encryption Modular inverse Extended Euclidean Algorithm Indistinguishability Privacy preservation Inverted index Database as a Service (DaaS) 2017-08-18 10:01:44 Journal contribution https://repository.lboro.ac.uk/articles/journal_contribution/A_new_secure_and_lightweight_searchable_encryption_scheme_over_encrypted_cloud_data/9463457 Searchable Encryption is an emerging cryptographic technique that enables searching capabilities over encrypted data on the cloud. In this paper, a novel searchable encryption scheme for the client-server architecture has been presented. The scheme exploits the properties of the modular inverse to generate a probabilistic trapdoor which facilitates the search over the secure inverted index table. We propose indistinguishability that is achieved by using the property of a probabilistic trapdoor. We design and implement a proof of concept prototype and test our scheme with a real dataset of files. We analyze the performance of our scheme against our claim of the scheme being light weight. The security analysis yields that our scheme assures a higher level of security as compared to other existing schemes.