METHOD AND DEVICE FOR PAYING ELECTRONIC COIN

摘要

PROBLEM TO BE SOLVED: To efficiently pay plural electronic(E) coins. SOLUTION: A payer sends E coins C1 to C3 and a license L to a payee to request payment. The payee verifies the E coins C1 to C3 and the license L, and when the E coins C1 to C3 and the license L are accepted, generates and sends time information T, a random number R and payee's identifier IdV to the payer as transaction identification information Chall. The payer prepares a signature Su by payment amount y1 to y3 based on the coins C1 to C3 and a secret key SKU for the information Chall and sends the signature Su and the amounts y1 to y3 to the payee. The payee verifies the signature Su based on a disclosed key PKU, and when the signature Su is accepted, accepts payment y1+y2+y3 by the coins C1 to C3.