NDLI: DeSCal - Decentralized Shared Calendar for P2P and Ad-Hoc Networks

Content Provider	IEEE Xplore Digital Library
Author	Achara, J.P. Imine, A. Rusinowitch, M.
Copyright Year	2011
Abstract	This paper describes the design and implementation of a Decentralized Shared Calendar (abbreviated as DeSCal), a distributed application which provides users a decentralized infrastructure to share their calendar events with selected users in a dynamic group. Although being a distributed application, DeSCal is as responsive as a personal calendar. It achieves this high responsiveness by keeping a local copy of the shared calendar at each participating user. Consistency of these replicated copies of the shared calendar is carried out in a decentralized fashion using Operational Transformation (OT) approach. OT allows users to concurrently modify the shared calendar and exchange their updates in any order since it ensures the convergence of copies of the shared calendar in all cases. To prevent unauthorized access by illegal users, DeSCal is endowed with access control mechanism on the local copy of the shared calendar. It employs a flexible access control model based on replicating the access data-structure at each user site to overcome the latency problem. Also, access control on the shared calendar events is dynamic i.e. users are able to change the access rights on their shared calendar events at any point of time after the creation of an event. In short, DeSCal is totally decentralized, scalable and self-configurable i.e., no need of a third party to manage it.
Starting Page	223
Ending Page	231
File Size	550549
Page Count	9
File Format	PDF
ISBN	9781457715365
DOI	10.1109/ISPDC.2011.40
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-07-06
Publisher Place	Romania
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Calendars Google Servers Ad hoc networks Authorization Collaboration Responsiveness Consistency Access Control Decentralized Scalability Concurrency
Content Type	Text
Resource Type	Article

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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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