NDLI: Stopping sets for physical-layer security

Content Provider	IEEE Xplore Digital Library
Author	Harrison, W.K. Almeida, J. Klinc, D. McLaughlin, S.W. Barros, J.
Copyright Year	2010
Description	Author affiliation: School of Electrical and Computer Engineering Georgia Institute of Technology, Atlanta, Georgia 30332 (Harrison, W.K.; Klinc, D.; McLaughlin, S.W.) \|\| Instituto de Telecomunicações, Departamento de Engenharia Electrotécnica e de Computadores, Faculdade de Engenharia da Universidade do Porto, Portugal (Almeida, J.; Barros, J.)
Abstract	Physical-layer security based on wiretap codes can be used to complement cryptographic applications at higher layers of the protocol stack. We assume a passive eavesdropper that has access to noise-corrupted codewords with erasures that are statistically independent to those of the legitimate communication partners. Our goal is to minimize the information leaked to the eavesdropper. In this paper we present a low-complexity coding scheme for channels with feedback, which employs extensive interleaving of carefully punctured LDPC codewords. The key idea is to ensure that every transmitted packet is crucial for successful decoding. This is achieved by ensuring that stopping-set bit combinations for coded blocks are distributed among different packets and by enforcing that retransmission requests be restricted to the friendly parties. A probabilistic analysis reveals that an eavesdropper who uses a message-passing decoding algorithm will experience catastrophic decoding failure with high probability. This encoder thus provides physical-layer secrecy which is both independent from, and complementary of, the cryptographic layer. The proposed scheme works even when an eavesdropper has a better channel than the legitimate receiver.
Starting Page	1
Ending Page	5
File Size	516948
Page Count	5
File Format	PDF
ISBN	9781424482627
e-ISBN	9781424482641
e-ISBN	9781424482634
DOI	10.1109/CIG.2010.5592686
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-08-30
Publisher Place	Ireland
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Receivers Encoding Parity check codes Decoding Cryptography Channel models
Content Type	Text
Resource Type	Article

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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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