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摘要
According to the theory of oblivious transfer, this paper proposed an online ordering scheme of digital products which can effectively protect the user's privacy through oblivious signature-based envelope (OSBE) based on RSA signature. First, the user pays the bank correctly, getting the digital signature of the product he will order. Then with the signature the user interacts with the merchant obliviously. The user can only get the product he needs while preventing the merchant malicious fraud. And the merchant cannot ascertain the detailed product that the user has ordered.
