69 citations · 109 across the 10 of their papers we have counts for
10 papers
Proof of Authenticity of General IoT Information with Tamper-Evident Sensors and Blockchain
Kenji Saito
Sensor data in IoT (Internet of Things) systems is vulnerable to tampering or falsification when transmitted through untrusted services. This is critical because such data increasi…
Is Ethereum Proof of Stake Sustainable? Considering from the Perspective of Competition Among Smart Contract Platforms
Kenji Saito, Yutaka Soejima, Toshihiko Sugiura +2
Since the Merge update upon which Ethereum transitioned to Proof of Stake, it has been touted that it resulted in lower power consumption and increased security. However, even if t…
Fabchain: Managing Audit-able 3D Print Job over Blockchain
Ryosuke Abe, Shigeya Suzuki, Kenji Saito +3
Improvements in fabrication devices such as 3D printers are becoming possible for personal fabrication to freely fabricate any products. To clarify who is liable for the product, t…
Privacy-Preserving Infection Exposure Notification without Trust in Third Parties
Kenji Saito, Mitsuru Iwamura
In response to the COVID-19 pandemic, Bluetooth-based contact tracing has been deployed in many countries with the help of the developers of smartphone operating systems that provi…
Requirement Analyses and Evaluations of Blockchain Platforms per Possible Use Cases
Kenji Saito, Akimitsu Shiseki, Mitsuyasu Takada +11
It is said that blockchain will contribute to the digital transformation of society in a wide range of ways, from the management of public and private documents to the traceability…
Lightweight Selective Disclosure for Verifiable Documents on Blockchain
Kenji Saito, Satoki Watanabe
To achieve lightweight selective disclosure for protecting privacy of document holders, we propose an XML format for documents that can hide arbitrary elements using a cryptographi…
Proof of Authenticity of Logistics Information with Passive RFID Tags and Blockchain
Hiroshi Watanabe, Kenji Saito, Satoshi Miyazaki +4
In tracing the (robotically automated) logistics of large quantities of goods, inexpensive passive RFID tags are preferred for cost reasons. Accordingly, security between such tags…
How to Make a Digital Currency on a Blockchain Stable
Kenji Saito, Mitsuru Iwamura
Bitcoin and other similar digital currencies on blockchains are not ideal means for payment, because their prices tend to go up in the long term (thus people are incentivized to ho…
Towards Application Portability on Blockchains
Kazuyuki Shudo, Reiki Kanda, Kenji Saito
We discuss the issue of what we call {\em incentive mismatch}, a fundamental problem with public blockchains supported by economic incentives. This is an open problem, but one pote…
Digital Currency Design for Sustainable Active Debris Removal in Space
Kenji Saito, Shinji Hatta, Toshiya Hanada
Orbital debris remains as an obstacle to further space development. While efforts are ongoing to avoid newly launched objects becoming debris, the number of debris would still cont…