DocumentCode :
2652390
Title :
LDPC codes for the Gaussian wiretap channel
Author :
Klinc, D. ; Ha, Jeongseok ; McLaughlin, Steven W. ; Barros, João ; Kwak, Byung Jae
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
fYear :
2009
fDate :
11-16 Oct. 2009
Firstpage :
95
Lastpage :
99
Abstract :
A coding scheme for the Gaussian wiretap channel based on low-density parity-check (LDPC) codes is presented. The messages are transmitted over punctured bits to hide data from eavesdroppers. It is shown by means of density evolution that the BER of an eavesdropper, who operates below the code´s SNR threshold and has the ability to use a bitwise MAP decoder, increases to 0.5 within a few dB. It is shown how asymptotically optimized LDPC codes can be designed with differential evolution where the goal is to achieve high reliability between friendly parties and security against a passive eavesdropper while keeping the security gap as small as possible. The proposed coding scheme is also efficiently encodable in almost linear time.
Keywords :
AWGN channels; error statistics; maximum likelihood decoding; parity check codes; AWGN channel; BER; Gaussian wiretap channel; LDPC codes; MAP decoder; SNR threshold; bit-error-rate; coding scheme; eavesdropper; low-density parity-check codes; AWGN channels; Bit error rate; Conferences; Decoding; Error correction codes; Information theory; Parity check codes; Security; Telecommunication computing; USA Councils;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Information Theory Workshop, 2009. ITW 2009. IEEE
Conference_Location :
Taormina
Print_ISBN :
978-1-4244-4982-8
Electronic_ISBN :
978-1-4244-4983-5
Type :
conf
DOI :
10.1109/ITW.2009.5351456
Filename :
5351456
Link To Document :
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