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Fujisawa Lab
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A lab that researches cryptography and communication to make information transmission highly reliable and secure.
AboutAbout the lab
Making information networks secure and highly reliable
The Fujisawa Lab researches technologies for achieving highly reliable information transmission and secure networks.
Its fields are coding theory and information security, covering code-based cryptography, blockchain, secure computation, and secret sharing.
In addition to wireless network research, the lab pursues joint research on DNA storage, support systems for hammering-sound inspection, and medical image processing.
The lab also develops information systems that apply these technologies.
Key terms
- Post-quantum cryptography
- Cryptography that is difficult to break even with quantum computers. Schemes include code-based cryptography.
- Secure computation
- A technology that enables various computations on data while it remains encrypted.
- Secret sharing
- A technology that converts secret information into multiple shares and sends them to multiple participants.
ResearchResearch themes
The Fujisawa Lab mainly researches technologies for achieving highly reliable and secure information transmission. It also develops information systems that apply these technologies.
*Illustrative imageCode-Based Post-Quantum Cryptography
Aiming for cryptography that cannot be broken even by quantum computers, the lab studies code-based cryptography, which uses error-correcting codes. It aims to realize post-quantum cryptography using the McEliece cryptosystem.
*Illustrative imageBlockchain Applications
Using blockchain technology, the lab aims to realize a delivery system that is traceable and more transparent, in addition to preventing the counterfeiting of packages. The background is problems during delivery such as theft, loss, and substitution.
*Illustrative imageSecure Computation and Its Applications
The lab studies efficient, lightweight secure computation techniques, which allow computation on data while it remains encrypted, using secret sharing. As one application, it is also examining searchable encryption.
*Illustrative imageVisual Secret Sharing
This is a technology that splits a secret image into multiple share images, which restore the original image when overlaid. The lab researches protecting image data by printing the share images on physical media such as overhead projector (OHP) transparencies or transparent film.
MembersFaculty
The members of the Fujisawa Lab consist of faculty, secretaries, and doctoral, master's, and undergraduate students.As of 2025
- Associate ProfessorMasaya Fujisawa
- Assistant ProfessorAhmad Akmal Aminuddin
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: “Asymmetric encryption (colored)” Nicobon / CC BY-SA 4.0 (cropped)
- Code-Based Post-Quantum Cryptography: “Quantum Computer with Dispersive Background 2” OJB Quantum / CC BY 4.0 (cropped)
- Blockchain Applications: “Blockchain books Donner Rotterdam 22 Dec 2017” Someone Not Awful / CC BY-SA 4.0 (cropped)
- Secure Computation and Its Applications: “Various keys on keyring” Pittigrilli / CC BY-SA 4.0 (cropped)
- Visual Secret Sharing: “Overheadfilm 2007” Holger.Ellgaard / CC BY-SA 3.0 (cropped)
- Related lab (鬼沢研究室): “Radio tower with red gate” aismallard / CC BY-SA 3.0 (cropped)
- Related lab (中村研究室): “CCTV camera in Poland (1)” MichalPL / CC BY-SA 4.0 (cropped)
- Related lab (入江研究室): “Lens camera Industar 26 m” Dmitry Makeev / CC BY-SA 4.0 (cropped)
- Related lab
(寒水研究室): “Clinical Trial Admissions Coordinator with Study Volunteer ( )” NIAID / CC BY 2.0 (cropped)
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