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Paper Abstract and Keywords
Presentation 2026-08-02 15:30
Blind Per-Bit Z-Channel Estimation and CA-SCL Decoding for Reverse Fuzzy Extractors over Heterogeneous Channels
Jun Asatani (OUS) IT2026-26
Abstract (in Japanese) (See Japanese page) 
(in English) Physical Unclonable Functions (PUFs) exhibit asymmetric per-bit error behavior caused by manufacturing variations and aging, naturally modeled as heterogeneous Z-channels. Conventional decoders assuming symmetric BSC channels incur significant performance loss. We propose a server-side blind estimation scheme within the Reverse Fuzzy Extractor (RFE) framework, where per-bit Z-channel parameters are inferred from multi-challenge enrollment observations and incorporated into the log-likelihood ratios of a CRC-aided successive cancellation list (CA-SCL) polar decoder. We prove that single-challenge enrollment is information-theoretically insufficient for per-bit estimation. Simulations confirm that five or more enrollment challenges reduce the mean absolute estimation error sharply, achieving zero key failure rate without any device-side modification.
Keyword (in Japanese) (See Japanese page) 
(in English) Physical Unclonable Function (PUF) / Reverse Fuzzy Extractor (RFE) / Z-channel / Blind Channel Estimation / Polar Code / CA-SCL Decoding / /  
Reference Info. IEICE Tech. Rep., vol. 126, no. 135, IT2026-26, pp. 36-41, Aug. 2026.
Paper # IT2026-26 
Date of Issue 2026-07-25 (IT) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF IT2026-26

Conference Information
Committee IT  
Conference Date 2026-08-01 - 2026-08-02 
Place (in Japanese) (See Japanese page) 
Place (in English) Sahid Raya Hotel & Convention Yogyakarta 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Information Theory, General 
Paper Information
Registration To IT 
Conference Code 2026-08-IT 
Language English (Japanese title is available) 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Blind Per-Bit Z-Channel Estimation and CA-SCL Decoding for Reverse Fuzzy Extractors over Heterogeneous Channels 
Sub Title (in English)  
Keyword(1) Physical Unclonable Function (PUF)  
Keyword(2) Reverse Fuzzy Extractor (RFE)  
Keyword(3) Z-channel  
Keyword(4) Blind Channel Estimation  
Keyword(5) Polar Code  
Keyword(6) CA-SCL Decoding  
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1st Author's Name Jun Asatani  
1st Author's Affiliation Okayama University of Science (OUS)
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Speaker Author-1 
Date Time 2026-08-02 15:30:00 
Presentation Time 15 minutes 
Registration for IT 
Paper # IT2026-26 
Volume (vol) vol.126 
Number (no) no.135 
Page pp.36-41 
#Pages 6 
Date of Issue 2026-07-25 (IT) 

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