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专利名称：Electronic cash implementing method and
equipment using user signature andrecording medium recorded thereon aprogram for the method
发明人：Hidemi Moribatake,Tatsuaki Okamoto申请号：US09219447申请日：19981223公开号：US065393B2公开日：20030325
专利附图：
摘要：A user registers a user public key PKU as a pseudonym at a trustee or issuer
and obtains an signature for the pseudonym as a license. The sends the pseudonym, PKUidentification information IdU and the amount of withdrawal x to the issuer institution.The issuer increments a balance counter of the pseudonym by x, then generates an issuersignature SKI(PKU, x) with a secret key SKI, and sends the issuer signature as an electroniccash to the user. The user verifies the validity of the issuer signature with a public key SKI,and if valid, increments an electronic cash balance counter Balance by x. At the time ofpayment, user sends the public key PKU and the license to a shop, and the shop verifiesthe validity of the license, and if valid, sends a challenge to the user. The user attaches asignature to the challenge with user secret key SKU, then sends it to the shop togetherwith the amount due y, and decrements the electronic cash balance counter by y.
申请人：NIPPON TELEGRAPH AND TELEPHONE CORPORATION
代理机构：Connolly Bove Lodge & Hutz LLP
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