A Two-level Time-Stamping System
نویسندگان
چکیده
electronic document existed at a certain point in time and that it has not been modified since then. Different time-stamping schemes have already been proposed. Most of them use the concept of trusted Time-Stamping Authority (TSA). A TSA is in charge of time-stamping documents and delivering a timestamping certificate for each time-stamped document. The purpose of this paper is to propose a new time-stamping scheme using a Local Time-stamping System (LTS). The main idea can be summarised as follows: digests of the documents to be time-stamped are sent to a Local Time-stamping System (LTS). The LTS accumulates the digests into a round value using a roundTime-Stamping is a cryptographic technique which allows us to prove that an Verification protocol, Digital Notary Services Time-stamping protocols, Time-Stamping Authority, One Way Accumulator, based protocol. The round value is then time-stamped by a trusted and official TSA. We show how this time-stamping scheme could be useful for an organisation such as a digital library or a company.
منابع مشابه
Imes Discussion Paper Series Institute for Monetary and Economic Studies Bank of Japan
Time stamping is a technique used to prove the existence of certain digital data prior to a specific point in time. With the recent development of electronic commerce, time stamping is now widely recognized as an important technique used to ensure the integrity of digital data for a long time period. Various time stamping schemes and services have been proposed. When one uses a certain time sta...
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