Paper 2022/1114

Multi-User Dynamic Searchable Symmetric Encryption with Corrupted Participants

Javad Ghareh Chamani, Hong Kong University of Science and Technology, Sharif University of Technology
Yun Wang, Hong Kong University of Science and Technology
Dimitrios Papadopoulos, Hong Kong University of Science and Technology
Mingyang Zhang, Poisson Lab, Huawei Technologies, Beijing, China
Rasool Jalili, Sharif University of Technology

We study the problem of multi-user dynamic searchable symmetric encryption (DMUSSE) where a data owner stores its encrypted documents on an untrusted remote server and wishes to selectively allow multiple users to access them by issuing keyword search queries. Specifically, we consider the case where some of the users may be corrupted and colluding with the server to extract additional information about the dataset (beyond what they have access to). We provide the first formal security definition for the dynamic setting as well as forward and backward privacy definitions. We then propose μSE, the first provably secure DMUSSE scheme and instantiate it in two versions, one based on oblivious data structures and one based on update queues, with different performance trade-offs. Furthermore, we extend μSE to support verifiability of results. To achieve this, users need a secure digest initially computed by the data owner and changed after every update. We efficiently accommodate this, without relying on a trusted third party, by adopting a blockchain-based approach for the digests’ dissemination and deploy our schemes over the permissioned Hyperledger Fabric blockchain. We prototype both versions and experimentally evaluate their practical performance, both as stand-alone systems and running on top of Hyperledger Fabric.

Available format(s)
Cryptographic protocols
Publication info
Published elsewhere. IEEE Transactions on Dependable and Secure Computing
Dynamic Multi-User Searchable Encryption Secure Cloud Computing Data Outsourcing
Contact author(s)
jgc @ cse ust hk
ywangik @ cse ust hk
dipapado @ cse ust hk
zhangmingyang4 @ huawei com
jalili @ sharif edu
2022-08-29: approved
2022-08-28: received
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Creative Commons Attribution


      author = {Javad Ghareh Chamani and Yun Wang and Dimitrios Papadopoulos and Mingyang Zhang and Rasool Jalili},
      title = {Multi-User Dynamic Searchable Symmetric Encryption with Corrupted Participants},
      howpublished = {Cryptology ePrint Archive, Paper 2022/1114},
      year = {2022},
      doi = {10.1109/TDSC.2021.3127546},
      note = {\url{}},
      url = {}
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