NDLI: Versatile Key Management for Secure Cloud Storage

Content Provider	IEEE Xplore Digital Library
Author	Graf, S. Lang, P. Hohenadel, S.A. Waldvogel, M.
Copyright Year	2012
Abstract	Not only does storing data in the cloud utilize specialized infrastructures facilitating immense scalability and high availability, but it also offers a convenient way to share any information with user-defined third-parties. However, storing data on the infrastructure of commercial third party providers, demands trust and confidence. Simple approaches, like merely encrypting the data by providing encryption keys, which at most consist of a shared secret supporting rudimentary data sharing, do not support evolving sets of accessing clients to common data. Based on approaches from the area of stream-encryption, we propose an adaption for enabling scalable and flexible key management within heterogeneous environments like cloud scenarios. Representing access-rights as a graph, we distinguish between the keys used for encrypting hierarchical data and the encrypted updates on the keys enabling flexible join-/leave-operations of clients. This distinction allows us to utilize the high availability of the cloud as updating mechanism without harming confidentiality. Our graph-based key management results in an adaption of nodes related to the changed key. The updates on the keys again continuously create an overhead related to the number of these updated nodes. The proposed scalable approach utilizes cloud-based infrastructures for confidential data and key sharing in collaborative workflows supporting variable client-sets.
Starting Page	469
Ending Page	474
File Size	233318
Page Count	6
File Format	PDF
ISBN	9781467323970
ISSN	10609857
DOI	10.1109/SRDS.2012.80
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-10-08
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Materials Encryption Permission Cloud computing Availability Scalability encryption cloud key management versakey confidentiality
Content Type	Text
Resource Type	Article
Subject	Theoretical Computer Science Computer Networks and Communications Software Hardware and Architecture

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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