The 21st International Workshop on Security (IWSEC 2026) will be held
in Tokyo, Japan between November 24--26, 2026, at National Museum of
Nature and Science. IWSEC is an annual international workshop,
co-organized by ISEC of IEICE and CSEC of IPSJ.

Original papers on the research and development of various security
topics, as well as case studies and implementation experiences, are
solicited for submission to IWSEC 2026.

The previous IWSEC conferences have been held in Kyoto (2006), Nara
(2007), Kagawa (2008), Toyama (2009), Kobe (2010), Tokyo (2011),
Fukuoka (2012), Naha (2013), Hirosaki (2014), Nara (2015), Tokyo
(2016), Hiroshima (2017), Sendai (2018), Tokyo (2019), Fukui/Online
(2020), Tokyo/Online (2021), Tokyo/Online (2022), Yokohama/Online
(2023), Kyoto (2024), and Fukuoka (2025).

If you have any questions about the workshop, please ask us via
e-mail. Please do NOT contact the venue directly.

Conference scope

Original papers on the research and development of various security
topics, as well as case studies and implementation experiences, are
solicited for submission to IWSEC 2026. Topics of interest for IWSEC
2026 include all theory and practice of cryptography, information
security, and network security, as in the previous IWSEC workshops.

        Applied cryptography
        Anonymity
        Biometrics security and privacy
        Blockchain and cryptocurrency
        Cryptanalysis
        Cryptographic primitives
        Cryptographic protocols
        Cyber physical systems
        Cyberattacks and defenses
        Financial cryptography
        Forensics
        Formal methods for security analysis
        Hardware security
        Human-computer interaction, security, and privacy
        Internet-of-Things security
        Intrusion detection and prevention
        Law and ethics of cybersecurity
        Machine learning and AI security
        Malware analysis
        Measurements for cybersecurity
        Mobile and web security
        Multiparty computation
        Network, system and cloud security
        Offensive security
        Post-quantum cryptography
        Privacy-enhancing technologies
        Privacy-preserving data mining
        Program analysis
        Public-key cryptography
        Quantum cryptography and cryptanalysis
        Real-world cryptographic systems
        Side-channel and fault analysis
        Software security
        Supply chain security
        Symmetric-key cryptography
        Theory of cryptography

Important Dates

    Submission deadline: June 8, 2026 (AoE) June 18, 2026 (AoE) (Extended)
    Notification of decision: August 20, 2026 (AoE)
    Camera-ready version due: September 17, 2026 (AoE)

Best Paper Award

Prizes will be awarded to the authors of the Best Paper(s) and the
Best Student Paper(s). The main author of the Best Student Paper(s)
should be a full-time graduate or undergraduate student as of March
2026.

Journal Recommendation

It is planned that Program Co-Chairs will recommend the authors of
selected papers to submit their full versions to either of "IEICE
Trans. on Fundamentals, Special Section on Cryptography and
Information Security" or "Journal of Information Processing" after
consultation between Program Co-Chairs and the authors.

Proceedings

As in previous editions of the conference, the proceedings of IWSEC
2026 will be published in the Springer Lecture Notes in Computer
Science (LNCS) series.

Committees

General Co-Chairs:

    Katsuyuki Takashima (Waseda University, Japan)
    Tatsuya Mori (Waseda University, Japan)

Program Co-Chairs:

    Mehdi Tibouchi (NTT Social Informatics Laboratories, Japan)
    Toshiki Shibahara (NTT Social Informatics Laboratories, Japan)

Instructions for Authors

All submitted papers must be original, unpublished, and not submitted
in parallel to any other peer-reviewed conferences or
journals. Submitted papers must be written in English and be fully
anonymous with no author names, affiliations, acknowledgements, or
obvious references.

Authors should consult Springer's authors' guidelines and use their
LaTeX proceedings template. Submissions in other formats (e.g., Word)
are not accepted. Springer encourages authors to include their ORCIDs
in their papers. In addition, the corresponding author of each paper,
acting on behalf of all of the authors of that paper, must complete
and sign a Consent-to-Publish form. The corresponding author signing
the copyright form should match the corresponding author marked on the
paper. Once the files have been sent to Springer, changes relating to
the authorship of the papers cannot be made.

Submitted papers may contain at most 16 pages excluding appendices and
references, and at most 20 pages including appendices and
references. The Abstract input to EasyChair should be less than 500
words. Note that according to the latest LNCS guideline, appendices
are required to be placed before the references. Figures and tables
with color can be included in papers.

Optionally, any amount of clearly marked supplementary materials may
be supplied, following after the main body of the submitted paper;
however, reviewers are not required to read or review them, and
submissions should be intelligible without them. Supplementary
materials are mostly intended for additional data such as experimental
data or source code. Note that supplementary materials are not allowed
to be included in the camera-ready version.

Submissions are to be made via EasyChair. Only PDF files will be
accepted. Submissions not meeting these guidelines may be rejected
without consideration of their merit. For each accepted paper, at
least one of the authors must register for the workshop before the due
date of the camera-ready version and is also required to present the
paper at the workshop. The title and the list of authors of the final
version cannot be changed from the submitted version unless otherwise
approved by the program co-chairs. Note that some papers may be
accepted as short papers, merged papers, or conditionally accepted for
shepherding.