Abstracts - 3rd USENIX Workshop on Electronic Commerce
General-purpose Digital Ticket Framework
Ko Fujimura and Yoshiaki Nakajima
NTT Information and Communication Systems Labs
A digital ticket is a certificate that guarantees certain rights of
the ticket owner. There are many applications for digital tickets but
the ticket properties vary depending on the application. This variety
makes the digital ticket processing system expensive, especially if
dedicated systems must be developed for each application. This paper
thus addresses issues on developing a common data schema and
processing architecture for various types of digital tickets. This
paper clarifies requirements for a general-purpose digital ticket and
shows four features in contrast to digital cash: 1) parameterization
of ticket properties on anonymity, transferability, and divisibility;
2) machine-understandability of ticket contents; 3)
state-transitionality of ticket status; and 4) composability of
multiple tickets. To achieve parameterization of ticket properties and
machine-understandability, we propose a Resource Description Framework
(RDF)-based ticket description method. Its metadata facility enables
various ticket properties to be defined using multi-layered schemata.
To achieve state-transitionality and composability, we propose
describing a ticket using a set of signed descriptions linked with
restriction-specified incomplete/complete links. Finally, this paper
proposes a set of common ticket processing components.
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