The 20th International Workshop on Security (IWSEC 2025) will be held at ACROS Fukuoka, Fukuoka, Japan between November 25--27, 2025. 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 experiments, are solicited for submission to IWSEC 2025.

The previous IWSEC conferences were 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), and Kyoto (2024).

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

🎉 Best Paper Award 🎉

• Cryptanalysis of the best HFE-LL' Constructions
  Daniel Smith-Tone and Cristian Valenzuela
• Detecting and Mitigating Conflict-Based Cache Side-Channel Attacks by Monitoring Ping-Pong Accesses Patterns
  Hao Ma, Zhidong Wang, Da Xie, Jinchi Han and Wei Song

🎉 Best Student Paper Award 🎉

• Efficient Card-Based Protocols for Symmetric and Partially Doubly Symmetric Functions
  Shota Ikeda, Yoshihiro Takahashi, Kazumasa Shinagawa and Koji Nuida
• Supply Chain Threats in the MCP Ecosystem: Attack Vectors and Mitigation Strategies
  Yonghwa Lee, Wonseok Choi and Donghyun Nam

🎉 Best Poster Awards 🎉

• Improving Quantum Circuits of Shor's Algorithm for Binary Elliptic Curves
  Kaien Sho and Atsushi Takayasu
• Isogeny-based threshold encryption using POKE proposed by Basso et al. at EUROCRYPT 2025
  Toshiki Takatera, Hiroshi Onuki and Tsuyoshi Takagi
• Efficient Algorithms for Solving Underdetermined MQ Problems
  Hideki Asanuma, Kosuke Sakata and Tsuyoshi Takagi

Best Paper and Poster Award has been announced. Congratulations!!

Program at a Glance have been published.

Accepted Papers (Second Submission) have been announced! Congratulations to all the authors on their excellent work!🎉

Call for Posters have been announced. EasyChair submission page is open for poster submissions.

Accepted Papers (First Submission) have been announced! Congratulations to all the authors on their excellent work!🎉

EasyChair submission page is open for second submissions!

Call for Sponsors has been released.

Deadline for first paper submission has been extended.

The instructions for authors are available in Call for Papers.

EasyChair submission page is open for first deadline submissions.

IWSEC 2025 website has been launched.

IWSEC 2025 is co-located with AICompS 2025.