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Electronic cash system

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • H04K-001/00
출원번호 US-0895036 (1992-06-08)
우선권정보 JP-0143530 (1991-06-14); JP-0170131 (1991-07-10)
발명자 / 주소
  • Okamoto Tatsuaki (Yokosuka JPX) Ohta Kazuo (Zushi JPX)
출원인 / 주소
  • Nippon Telegraph and Telephone Corporation (Tokyo JPX 03)
인용정보 피인용 횟수 : 126  인용 특허 : 0

초록

In an electronic cash system, K sets of blind signature information are derived from secret information containing identification information of a user, K/2 sets of them are opened and a bank attaches a blind signature to the remaining K/2 sets of information. The user obtains a signed license from

대표청구항

An electronic cash system wherein a user who possesses electronic cash and a license issued from a bank uses said electronic cash, including: Step 1 wherein said user furnishes a shop with information containing a composite number, said electronic cash and said license, said composite number being t

이 특허를 인용한 특허 (126)

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