Seiichi Susaki

A study on user authentication infrastructure for next generation telematics

To receive a telematics service, it must first be authenticated, and each automobile (or car navigation system) has typically been linked to a particular vehicle owner who could authenticate such services. However, an increasing number of drivers use cars that are rented, leased, or obtained through a car-sharing program; in such cases, the present form of car authentication is insufficient. A better system would authenticate the individual who is using a car at a particular time, but is not necessarily the owner. In this paper, we propose a personal authentication infrastructure for next-generation telematics. Specifically, we propose personal authentication into that (1) between the person and the terminal, (2) between the terminal and the center.

INTERNET-MARKs: Clear, Secure, and Portable Visual Marks for the Cyber Worlds

Visual marks play critical roles in the physical world, but their use in the cyber world is limited because there they are easy to forge, tamper with and copy onto unauthorized data. This paper therefore describes a new type of visual marks that are secure because digital signatures are embedded in them and that can be used with a wide variety of cyber-world systems. It also shows the effectiveness of these marks by describing their application to WWW site authentication.

Third-party approach to controlling digital copiers

Information leakage through paper documents is not to be overlooked because it accounts for 43.8% of all the leakage in Japan. Most vendors of digital copiers are therefore offering new models equipped with additional security functions. Third-parties wanting to add security functions to copiers already used in their offices, however, need to know the copier specifications that the copier manufactures want to keep secret. In this paper we introduce our idea that enables a third party to control digital copiers. An application that enables us to monitor copying is also described.

Authenticating Web-Based Virtual Shops Using Signature-Embedded Marks - A Practical Analysis

Authenticating Web-based virtual shops is a critical problem in establishing electronic commerce as a social infrastructure. One solution is to use guarantee marks pasted on the Web pages of the virtual shops. However, its effectiveness depends on the reliability of the marks. This paper proposes a verifiable mark system in which digital signatures are embedded in the marks. A prototype authentication system based on this mark system was implemented and evaluated from practical viewpoints. The results show its feasibility.

Evaluation of Audio Watermark System Using Short Detection Time Frame

Assumed applications of copyright protection for music and synthesized voice are discussed. We developed a prototype audio watermark system combining the results of previous studies based on the patchwork algorithm, modifying the amplitude in the time-domain of voiced audio data, and using a reference signal. The results of experimental evaluation show that this our system can detect watermarks in a time frame as short as 2 s.

The Estimation of the New Feature Extracting Method for Tamper Detection in Printed Documents

In this paper, we report the experimental result of the estimation of our proposed technique to extract the feature of the printed documents for tamper detection. We have compared the proposed technique which uses median points as a feature and the existing technique which uses the area of the black dots as a feature. As an experiment, we calculated the median point of alphabets and numbers, and printed and scanned to see the probability of the collision, the uniformity of the distribution, invariability during D/A and A/D transform, and the invariability during the ordinal change of paper of our feature extracting method. For the probability of the collision, the proposed method showed lower probability of the collision than the existing one. For the uniformity of the distribution, the proposed method showed a half skew of the existing one. For the invariability during D/A and A/D transform, the proposed method showed the invariability of about a thirtieth of the one of the existing one. For the invariability during the ordinal change of paper, the proposed method showed an eighteenth invariability of the existing one. From the above results, we have concluded that as a feature extracting method, our proposed method is better than the existing one.

A study on an authentication infrastructure between terminal and asp for next generation telematics

To receive a telematics service, it must first be authenticated, and each automobile (or car navigation system) has typically been linked to a particular vehicle owner who could authenticate such services. However, an increasing number of drivers use cars that are rented, leased, or obtained through a car-sharing program; in such cases, the present form of car authentication is insufficient. A better system would authenticate the individual who is using a car at a particular time, but is not necessarily the owner. In this paper, we propose a personal authentication infrastructure for next-generation telematics. Specifically, we propose authentication infrastructure between the terminal and the service provider (ASP).