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Paper Abstract and Keywords
Presentation 2026-07-15 10:40
Consideration of Multi-Device Setting in the Messaging Layer Security Protocol
Shuya Hanai, Kazuhide Fukushima (KDDI Research, Inc.) ISEC2026-63 SITE2026-59 BioX2026-86 HWS2026-59 ICSS2026-78 EMM2026-70
Abstract (in Japanese) (See Japanese page) 
(in English) The Messaging Layer Security (MLS) Protocol provides a mechanism for secure group messaging.
For situations where a user has multiple devices, the Internet-Draft called MLS Virtual Clients was proposed.
By introducing virtual clients into MLS groups and sharing the accounts of those virtual clients across multiple devices, users can access the MLS groups from multiple devices without increasing the number of clients in the MLS groups or revealing details of the devices to other group users.
In this report, we present a discussion examining variations for the construction proposed in the MLS Virtual Clients Internet-Draft.
Keyword (in Japanese) (See Japanese page) 
(in English) Messaging Layer Security / Multi-Device / Secure Group Messaging / / / / /  
Reference Info. IEICE Tech. Rep., vol. 126, no. 107, ISEC2026-63, pp. 352-359, July 2026.
Paper # ISEC2026-63 
Date of Issue 2026-07-06 (ISEC, SITE, BioX, HWS, ICSS, EMM) 
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 ISEC2026-63 SITE2026-59 BioX2026-86 HWS2026-59 ICSS2026-78 EMM2026-70

Conference Information
Committee BioX HWS ISEC SITE ICSS EMM IPSJ-CSEC IPSJ-SPT 
Conference Date 2026-07-13 - 2026-07-15 
Place (in Japanese) (See Japanese page) 
Place (in English) Sapporo Convention Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To ISEC 
Conference Code 2026-07-BioX-HWS-ISEC-SITE-ICSS-EMM-CSEC-SPT-SEC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Consideration of Multi-Device Setting in the Messaging Layer Security Protocol 
Sub Title (in English)  
Keyword(1) Messaging Layer Security  
Keyword(2) Multi-Device  
Keyword(3) Secure Group Messaging  
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1st Author's Name Shuya Hanai  
1st Author's Affiliation KDDI Research, Inc. (KDDI Research, Inc.)
2nd Author's Name Kazuhide Fukushima  
2nd Author's Affiliation KDDI Research, Inc. (KDDI Research, Inc.)
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Speaker Author-1 
Date Time 2026-07-15 10:40:00 
Presentation Time 25 minutes 
Registration for ISEC 
Paper # ISEC2026-63, SITE2026-59, BioX2026-86, HWS2026-59, ICSS2026-78, EMM2026-70 
Volume (vol) vol.126 
Number (no) no.107(ISEC), no.108(SITE), no.109(BioX), no.110(HWS), no.111(ICSS), no.112(EMM) 
Page pp.352-359 
#Pages 8 
Date of Issue 2026-07-06 (ISEC, SITE, BioX, HWS, ICSS, EMM) 

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