NDLI: Security Aspects of Soft Verified Messages Protected by Message Authentication Codes

Content Provider	IEEE Xplore Digital Library
Author	Zivic, N.
Copyright Year	2012
Abstract	The subject of this paper is the security analysis of soft verification. Soft verification is used, when messages protected by Message Authentication Codes (MAC) are transmitted over the noisy channel without Automatic Re-peat Request (ARQ) protocol. This situation is given with the secure real-time, satellite or broadband communication. Forward Error Correction (FEC) Codes are able to correct many errors, but not all of them. These remaining errors disable a successful authentication of messages protected by MACs. Many applications, multimedia or biometric for example, would accept messages with a few or local errors. Therefore, an authentication method is requested, which accepts messages as authentic, although they would be rejected by the standard verification. Such a method is supported by soft authentication. Two groups of soft authentication algorithms will be described: algorithms, which generate error tolerant MACs, whose security aspects were already published, and an soft verification, based on soft decision decoding, whose security aspects have not yet been published. The security level of soft verified messages is reduced. The risk of forgery and security loss will be calculated. Formulas will be presented for the extension of the lengths of MACs to compensate for the reduction of the security level. Results show remarkable coding gains. Many more messages can be accepted as authentic by soft verification at the same security level compared to standard verification without soft verification.
Starting Page	1316
Ending Page	1322
File Size	269134
Page Count	7
File Format	PDF
ISBN	9781467321723
DOI	10.1109/TrustCom.2012.257
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-06-25
Publisher Place	United Kingdom
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fuzzy Authentication Decoding Security Standards Complexity Soft Output Authentication Message Authentication Codes Forgery Attacks Forgery Reliability Message authentication Soft Verification
Content Type	Text
Resource Type	Article

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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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