Presentation 2007-04-20
Building Time-Stamp Authority Grid and Basic Experiment
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) Digital time stamping is a technique to prove the existence of a digital data prior to a specific point in time. The centralized time-stamping authority has two major difficulties. One is administrative costs and another is scalability of performance. Distributed time-stamping methods were proposed to solve the problems. But they still have the problem to prepare many TSAs. We have shown that K=L+M among N for G-generation method is able to solve these existing problems. That method does the time-stamping to the mutuality by using many time-stamping units. And we also reported basic characteristics of the method and dependence on configuration parameters at the computer cluster environment on the LAN. In this report, we described that we built TSA Grid on the Internet to install several distributed TSU. And we investigated the influence of network time delay to the authorized time. We also considered that how many time-stamping units enable to be arithmetic mean value of responding authorized times within 1-second. As that result, if it prepared more than 256TSU that arithmetic mean of the authentication time because within 1 second. It became clear that the mode is able to get smaller delay time than that of arithmetic-mean.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) time-stamping / time-stamp / Grid
Paper # CPSY2007-3,DC2007-3
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Conference Information
Committee DC
Conference Date 2007/4/13(1days)
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Paper Information
Registration To Dependable Computing (DC)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Building Time-Stamp Authority Grid and Basic Experiment
Sub Title (in English)
Keyword(1) time-stamping
Keyword(2) time-stamp
Keyword(3) Grid
1st Author's Name Takeshi NISHIKAWA
1st Author's Affiliation Tokyo Institute of Technology()
2nd Author's Name Satoshi MATSUOKA
2nd Author's Affiliation Tokyo Institute of Technology:National Institute of Informatics
Date 2007-04-20
Paper # CPSY2007-3,DC2007-3
Volume (vol) vol.107
Number (no) 17
Page pp.pp.-
#Pages 6
Date of Issue