Privacy Protection in On-line Shopping for Electronic Documents

Blind decoding schemes are proposed as tools for protecting customerspsila privacy in on-line shopping for electronic documents such that the company has no way of knowing which documents the customers have purchased. Most of the blind decoding schemes suffer from the oracle problem. Schemes utilizing the transformability of digital signatures were proposed to ensure the correctness of the requests from the customers. In this paper, a secure blind decoding scheme based on RSA scheme is proposed. It does not utilize the transformability of RSA digital signature.