Device for secure system of payment, capable of micro-payment

摘要

A method for performing electronic payment transactions between at least three agents: a vendor, a customer and a broker each of which being able to connect to other two agents over a communication network. Values of cryptographically strong one-way hash function are used to secure the money transfer and authorize the agents involved in the transaction. The initialization of the payment session does not require any prearrangement over secure channel. Only one public-key cryptography operation is needed for each agent to distribute the shared secrets among the agents. Each subsequent transaction requires only calculation of few values of the hash function providing a method for efficient, cheap and fast micropayment system. The payment schemes based on the presented method are strongly debit oriented, avoiding troubles with fraud and double-spending. Method can be used over insecure channel. Each of the agents involved can encapsulate network of agents cooperating in the session.