Unlinkable Delivery System for Interactive Dramas

Shingo OKAMURA  Yoshiyuki KONISHI  Maki YOSHIDA  Toru FUJIWARA 

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences  Vol.E88-A  No.1  pp.262-269
Publication Date: 2005/01/01
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Application
Keyword: 
interactive drama,  delivery control,  protection of privacy,  partially blind signature scheme, 

Full Text: PDF(194.5KB)

Summary: 
We consider delivering interactive dramas. A viewer interacts with a contents provider by answering multiple-choice questions and the answers to these questions influence the plot of delivered story. All possible plots can be represented by a directed graph such that every plot corresponds to some path of the graph. A delivery should be controlled according to the directed graph such that each viewer's history of answered choices forms a path of the graph. On the other hand, because some character of a viewer is known to a contents provider from his history of choices, a viewer tries to prevent even a contents provider from linking choices made by him. In this paper, we introduce unlinkable delivery for an interactive drama and propose such a delivery system for interactive dramas that viewer's choices are unlinkable and delivery is controlled according to the directed graph.