An escrow electronic cash system with limited traceability

Authors:
Cheng-Yuan Ku;Chang-Jinn Tsao;Yi-Hsien Lin;Chien-Yuan Chen
Affiliations:
Department of Information Management, National Chung Cheng University, 160, San-Hsing, Ming-Hsiung, Chia-Yi County, Taiwan, ROC;Embedded Systems Laboratory, Institute for Information Industry, Taipei City, Taiwan, ROC;Department of Information Engineering, I-Shou University, Kaohsiung County, Taiwan, ROC;Department of Information Engineering, I-Shou University, Kaohsiung County, Taiwan, ROC
Venue:
Information Sciences—Informatics and Computer Science: An International Journal
Year:
2004

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Abstract

This paper proposes a novel escrow electronic cash system based on Yacobi's scheme. The system retains the anonymity characteristic of electronic cash. However, we added several protocols to make the investigators have the ability to trace the owner of the cash, the message sender and the message receiver through the escrow agents when necessary. For example, the government can trace "launderd" money, which is traded in the illegal or terroristic activities. More importantly, the escrow agent in this scheme is not involved in any normal transaction, so our system prevents excessive interference from the government. Thereafter the added protocols do not generally increase the trading time while compared with Yacobi's system.