Time-Stamping with Binary Linking Schemes
نویسندگان
چکیده
We state the basic requirements for time-stamping systems applicable as the necessary support to the legal use of electronic documents. We analyze the main drawbacks of the time-stamping systems proposed to date and present a new system that meets all the stated requirements. We prove that these requirements cannot be signi cantly tightened.
منابع مشابه
New linking schemes for digital time-stamping
Binary Linking Schemes (BLS) for digital time-stamping [3] provide (1) relative temporal authentication to be performed in logarithmic time, and (2) time-certi cates of reasonable size, which together with the data published in a widely available medium enable the veri er to establish their relative temporal positions, even if the database held by the Time-Stamping Service (TSS) ceases to exist...
متن کاملNew linking schemes for digital time -
Binary Linking Schemes (BLS) for digital time-stamping 3] provide (1) relative temporal authentication to be performed in logarithmic time, and (2) time-certiicates of reasonable size, which together with the data published in a widely available medium enable the veriier to establish their relative temporal positions, even if the database held by the Time-Stamping Service (TSS) ceases to exist....
متن کاملProviding Interoperable Time Stamping Services
This paper presents a web-based architecture for providing digital time stamping services. Time stamping services are typically divided into schemes which rely on unconditionally trusted Time Stamping Authorities (TSAs) and schemes which do not, namely the so called linking schemes. The proposed architecture relies on a multi-tier structure. The middle-tier exposes digital time stamping functio...
متن کاملImes 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...
متن کاملA Time-stamping Proxy Signature Scheme Using Time-stamping Service
In current proxy signature schemes, an original signer delegates her signing capability to a proxy signer, and then the proxy signer can sign messages on behalf of the original signer. Although these schemes have succeeded in proxy delegations, they share a common problem. That is, a verifier cannot ascertain that a proxy signature was signed by the proxy signer during the valid delegation peri...
متن کامل