Cross-group secret sharing for secure cloud storage service

Chenyutao Ke, Hiroaki Anada, Junpei Kawamoto, Kirill Morozov, Kouichi Sakurai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

With the spread of the Internet, many mobile devices are used in our daily lives, such as tablets and mobile phones. Then, personal data are often saved on data servers of the storage providers such as Amazon, Google, Yahoo, Baidu and others. In this context, the secret sharing can be used to store personal data onto several providers, simultaneously reducing the risk of data loss, the data leakage to unauthorized parties, and data falsification. Secret sharing is one of the solutions to combine security and availability in the distributed storage. However, few works considered servers' affiliations, and specifically, the problem that a malicious provider may recover secret data illegally through manipulation on servers that hold enough shares to recover the secret. In this paper, to resolve the problem, we propose a two-threshold secret sharing scheme in order to enforce a new type of cross-group policy. By combining t-out-of-m providers' secret sharing scheme and a k-out-of-n servers' secret sharing scheme via an one-way function or an one-time pad, we construct a scheme that forces k shares to be collected from m groups. Compared with previous work, our scheme can attain the functionalities of proactively updating shares and adding new shares with simple computation.

Original languageEnglish
Title of host publicationACM IMCOM 2016
Subtitle of host publicationProceedings of the 10th International Conference on Ubiquitous Information Management and Communication
PublisherAssociation for Computing Machinery, Inc
ISBN (Electronic)9781450341424
DOIs
Publication statusPublished - Jan 4 2016
Event10th International Conference on Ubiquitous Information Management and Communication, IMCOM 2016 - Danang, Viet Nam
Duration: Jan 4 2016Jan 6 2016

Publication series

NameACM IMCOM 2016: Proceedings of the 10th International Conference on Ubiquitous Information Management and Communication

Other

Other10th International Conference on Ubiquitous Information Management and Communication, IMCOM 2016
CountryViet Nam
CityDanang
Period1/4/161/6/16

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Information Systems

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  • Cite this

    Ke, C., Anada, H., Kawamoto, J., Morozov, K., & Sakurai, K. (2016). Cross-group secret sharing for secure cloud storage service. In ACM IMCOM 2016: Proceedings of the 10th International Conference on Ubiquitous Information Management and Communication [a63] (ACM IMCOM 2016: Proceedings of the 10th International Conference on Ubiquitous Information Management and Communication). Association for Computing Machinery, Inc. https://doi.org/10.1145/2857546.2857610