On secure data sharing in cloud environment
- Authors
- Junggab Son; Hyunbum Kim; Donghyun Kim; Heekuck Oh
- Issue Date
- Jan-2014
- Publisher
- Association for Computing Machinery
- Keywords
- Cloud computing; CPRE (conditional PRE); Data sharing; PRE (proxy re-encryption)
- Citation
- Proceedings of the 8th International Conference on Ubiquitous Information Management and Communication, ICUIMC 2014, pp.1 - 7
- Indexed
- SCOPUS
- Journal Title
- Proceedings of the 8th International Conference on Ubiquitous Information Management and Communication, ICUIMC 2014
- Start Page
- 1
- End Page
- 7
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/25458
- DOI
- 10.1145/2557977.2558068
- ISSN
- 0000-0000
- Abstract
- Over years, cloud computing has been rapidly changing the shape of modern computing environment. The problem of how to keep the confidentiality of user data against malicious entities including a cloud service provider has been recognized as a significant issue. This problem becomes even more complicated if a data is shared among multiple users. Recently, the idea of proxy reencryption has been introduced to support secure data sharing among group members in cloud environment. However, in this scheme, a malicious user can collude with the server to decrypt unauthorized messages. The conditional proxy re-encryption (CPRE) aims to fix this problem by introducing a condition value into message encryption process and re-encryption key generation. We observe that CPRE becomes significantly inefficient when the membership of the group changes very actively and the size of the group is large since a new condition value is selected and re-encryption keys have to be generated for each user whenever the group membership is changed. This paper introduces a new CPRE in which the condition value is not associated with re-encryption keys. Whenever a group membership is changed, only a new condition value is distributed to the users via cloud server. As a result, the overhead of each user becomes significantly reduced at each membership change. Copyright 2014 ACM.
- Files in This Item
-
Go to Link
- Appears in
Collections - COLLEGE OF COMPUTING > ERICA 컴퓨터학부 > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/25458)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.