A METHOD OF SALE AUDITING IN PRIVATE TRANSACTION OF E-GOODS

摘要

A method for trading digital goods online between a merchant (23) and customer (30) including the steps of the merchant (23) encrypting each digital good with respective unique keys (9, 10, 11, 12) to create encrypted goods (1, 2, 3, 4), the merchant encrypting each respective unique key with a common key (13) to create respective encrypted keys (19, 20, 21, 22), the merchant making the encrypted goods and the respective encrypted keys available to the customer (30), the customer downloading (31) one encrypted good and respective encrypted key, the customer adding (32) a customer encryption to the respective encrypted key to create a combined key, and returning the combined key to the merchant, the merchant removes common encryption from the combined key using the common key to create a customer encrypted key, and returns (32) the customer encrypted key to the customer, the customer decrypts the customer encrypted key to obtain the respective unique key and uses the respective unique key to decrypt the digital good.