Patent ID: 8712915

Claim:
An online system for private variable cost digital goods pricing, comprising: a database configured to store an original encrypted price for non-identically-priced digital goods offered for online sale; an e-commerce server with a processor and a memory configured to execute code, comprising: a pricing module configured to determine a price for at least one of the non-identically priced digital goods, comprising: a constant module configured to create a purchase encrypted price by addition of a positive constant to the original encrypted price of the non-identically-priced digital good each time that the non-identically priced digital good is purchased; a demand module configured to measure, over a fixed time interval, the demand at the purchase encrypted price for the non-identically priced digital good; and an additive module configured to set the price by subtraction of a positive additive from the purchase encrypted price of the digital good at the end of the fixed time interval; and a seller system module configured to update the original encrypted price of the particular digital good with the price; and a purchaser client with a processor and a memory configured to execute code, comprising: an encryption module configured to create a homomorphically encrypted price by homomorphically encrypting the purchase encrypted price; and a decision module configured to provide a purchasing decision of a particular online buyer about a particular digital good at the homomorphically encrypted price.