NDLI: Visual CAPTCHAs for Document Authentication

Content Provider	IEEE Xplore Digital Library
Author	Fischer, I. Herfet, T.
Copyright Year	2006
Description	Author affiliation: Telecommun. Lab., Saarland Univ., Saarbrucken (Fischer, I.; Herfet, T.)
Abstract	Visual CAPCTCHAs, like gimpy images, are commonly used to screen human users from automated computer scripts. We propose using them for direct, visual authentication of digital documents. The basic assumption is that if it is hard or impossible for the computer to recognize a document, then it cannot manipulate it. If such a document is still recognizable by a human, he or she can be confident that it is authentic, or at least that no automated process has manipulated it. Such authentication is highly desirable in the context of digital signatures, which, due to the computational complexity, have to be produced by a computer. It can be a specialized, trusted cryptographic computer, e.g. a smartcard, but the path to it is generally not secure. Visual CAPTCHAs can be used for securing the path without the need for additional hardware
Starting Page	471
Ending Page	474
File Size	5686125
Page Count	4
File Format	PDF
ISBN	0780397517
DOI	10.1109/MMSP.2006.285353
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-10-03
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Authentication Computer displays Digital signatures Cryptography Contracts Hardware Humans Computer hacking Writing Educational institutions
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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