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Dive into the research topics where Kei Karasawa is active.

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Featured researches published by Kei Karasawa.


consumer communications and networking conference | 2005

A detachable IPsec device for secure consumer communication

Kei Karasawa; Yusuke Kira; Yoshitsugu Tsuchiya; Kohji Yamada; Kenji Takahashi

Communications among consumer appliances are often directly related to users privacy. Unfortunately, most of the consumer appliances are not sufficiently equipped with security and privacy protection functions. We propose IPsec-Proxy technology which is implemented on a security device that can protect privacy, at the same time maintaining simplicity of operations of current appliances. It enables to incrementally attach IPsec functions on consumer communication networks as well as detach them from the networks by simply eliminating themselves. We have implemented it on a small PC running as an IP bridge and measured the performance. Throughout our proposal, we have confirmed the feasibility of the security protection platform for privacy-related information using IPsec-Proxy technology. Our platform requires neither modifications nor additional customization to the current consumer appliances.


Archive | 2004

Authentication system based on address, device thereof, and program

Yukio Tsuruoka; Yoshinaro Kikuchi; Shintaro Mizuno; Kenji Takahashi; Kei Karasawa


Archive | 2008

CLIENT DEVICE, KEY DEVICE, SERVICE PROVIDING APPARATUS, USER AUTHENTICATION SYSTEM, USER AUTHENTICATION METHOD, PROGRAM, AND RECORDING MEDIUM

Yukio Tsuruoka; Shingo Orihara; Kei Karasawa; Kenji Takahashi


Archive | 2008

User authentication system and its method

Kei Karasawa; Nachi Ueno; Kenji Takahashi; Yukio Tsuruoka; Shingo Orihara


Archive | 2008

Common key setting method, relay apparatus, and program

Nachi Ueno; Shingo Orihara; Kei Karasawa; Yukio Tsuruoka


Archive | 2008

CERTIFICATE AUTHENTICATING METHOD, CERTIFICATE ISSUING DEVICE, AND AUTHENTICATION DEVICE

Kei Karasawa; Masahisa Kawashima; Yukio Tsuruoka; Kenji Takahashi; Shingo Orihara


Archive | 2008

USER AUTHENTICATION SYSTEM AND METHOD FOR THE SAME

Kei Karasawa; Nachi Ueno; Kenji Takahashi; Yukio Tsuruoka; Shingo Orihara


Archive | 2008

Common key setting method, relay device, and program

Nachi Ueno; Shingo Orihara; Kei Karasawa; Yukio Tsuruoka


Archive | 2004

User authentication system for providing online services based on the transmission address

Yukio Tsuruoka; Yoshinao Kikuchi; Shintaro Mizuno; Kenji Takahashi; Kei Karasawa


Ntt Review | 2002

Fieldcast: Making the best use of heterogeneous access networks

Yoshitsugu Tsuchiya; Kenji Takahashi; Rie Ohtsubo; Kei Karasawa; Akira Kanemaru; Takeshi Kaji; Hirohide Mikami

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Yukio Tsuruoka

Nippon Telegraph and Telephone

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Kenji Takahashi

Nippon Telegraph and Telephone

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Shingo Orihara

Nippon Telegraph and Telephone

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