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Yoshioka-Sasaki Lab
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A security lab that observes and analyzes cyberattacks and works out countermeasures.
AboutAbout the lab
Observing and analyzing attacks to develop countermeasures
The Yoshioka-Sasaki Lab studies the observation, analysis, and countermeasures of cyberattacks that are actually occurring.
It also works on predicting attacks expected to occur in the near future, and is interested in practical, highly applicable cybersecurity technologies.
Its themes range widely, from usable security, which centers on the people who use systems, to malware countermeasures and the observation of infections in IoT devices.
The lab also provides services, such as operating honeypots, which are decoy observation systems.
Key terms
- Usable security
- Research that, unlike security approaches focused on technology, centers on the people who use systems. It also draws on psychology and behavioral economics
- CaaS
- Short for Crime as a Service. Services offered by attackers, which the lab observes
- Honeypot
- A decoy observation system that deliberately attracts attacks so that they can be examined in detail
NewsLab news
A student team won the Minister of Education, Culture, Sports, Science and Technology Award, among others, at the Information Crisis Management Contest
A lab paper won the 2025 ICSS Research Award
A lab member won the top prize at the Digital Forensics Outstanding Young Researcher Award
A paper on HTTP exploits targeting IoT devices was accepted at AsiaCCS 2026
Lab papers won the Student Paper Award, the Ethical Practice Award, and an Encouragement Award at CSS2025
ResearchResearch themes
The lab studies practical, highly applicable cybersecurity technologies, such as observing, analyzing, and countering cyberattacks that are actually occurring, and predicting attacks expected in the near future. Its themes are broad, ranging from user behavior and attacker activity to IoT devices and the web.
*Illustrative imageUsable Security
The lab studies security centered on users, drawing on approaches from psychology and behavioral economics. It aims at countermeasures that lead to user actions and decisions, reducing the burden on users without compromising efficiency or effectiveness.
*Illustrative imageThreat Intelligence
By combining information from malware analysis and network monitoring with observations of threat actors, of CaaS (Crime as a Service), which are services provided by attackers, and of the cryptocurrency transactions behind them, the lab aims to elucidate the cyberattack ecosystem. It also studies methods for collecting and analyzing information from social media, the dark web, and other sources.
*Illustrative imageCountermeasures against Advanced Malware
The lab studies countermeasures against advanced malware that evades cutting-edge defenses such as sandboxes. It also studies methods for evaluating how well existing security technologies and services, such as antivirus software, can withstand such malware.
*Illustrative imageObserving Malware Infections in IoT Devices
Using honeypots, which are decoy observation systems, the lab was the first in the world to observe and analyze in detail the fact that large numbers of the various devices that make up the Internet of Things (IoT) are infected with malware. It provides information and malware samples to research organizations and security vendors in Japan and abroad.
MembersFaculty
The members of the Yoshioka-Sasaki Lab consist of faculty, project faculty, a Senior Distinguished Professor, IAS visiting faculty and researchers, an Assistant Professor at the Information Technology Center, part-time faculty and lecturers, technical assistants, and students in the doctoral, master's, and undergraduate programs.As of 2026
- ProfessorKatsunari Yoshioka
- Associate ProfessorTakayuki Sasaki
- Project Associate ProfessorYin Minn Pa Pa
- Project Associate ProfessorYuki Shimotani
- Project Assistant ProfessorNguyen Thi Van Anh
- Project Assistant ProfessorHaruki Ishikawa
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Network-cables-1” HenryNewman12 / CC BY-SA 4.0 (cropped)
- Usable Security: “Fingerprint scanner identification” Rachmaninoff / CC BY-SA 3.0 (cropped)
- Threat Intelligence: “NSOC-2012” Unknown photographer / Public domain (cropped)
- Countermeasures against Advanced Malware: “AI End-Scenario 1 Rogue Malware tamingtheaibeast” tamingtheaibeast.org / CC BY-SA 4.0 (cropped)
- Observing Malware Infections in IoT Devices: “Chain of home devices (including IoT) with passwords or pin” Andrzej Kasprzyk (itring.pl) / CC BY 3.0 (cropped)
- Related lab (Tomii Lab): “Multimedia Engineering” Beamthanadol / CC BY-SA 4.0 (cropped)
- Related lab (Shima Lab): “EMG - SIMI” D. Gordon E. Robertson / CC BY-SA 3.0 (cropped)
- Related lab (Fujii Lab): “I am a moral person (2)” Eredics / CC BY-SA 4.0 (cropped)
- Related lab (Shikata Lab): “Asymmetric encryption scheme” MarcT0K (icons by JGraph) / CC BY 4.0 (cropped)
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