Abstract: Generalized, low-cost, and easy digital signature verification techniques for use in information processing operations that require a plurality of digital signatures and series of information processing operations that require a plurality of digital signatures based on the progression of operations. Techniques are provided for verifying signatures on an information processing request, received via a network from a processing application computer, to which multiple digital signatures are to be affixed.

Abstract: Techniques that allow trust evaluation institutions to share trust information of members (users) belonging to different trust evaluation institutions. A member registered at one trust evaluation institution can carry out a transaction with a member registered at another trust evaluation institution even if the trust evaluation institutions use different techniques, methods, procedures, or standards for evaluating trust information for their members.

Abstract: The present invention provides a payment method that balances reliability, security, and speed of payments, a system for the same, and a recording medium storing a program for the same. In one embodiment, a financial institution such as a credit company, a bank, or the like determines whether or not a payment request from a buyer is valid using billing information from the merchant involved in the payment and authentication information from the buyer. Then, if the billing information sent from the merchant does not match the ordering information extracted from the authentication information, the payment request is rejected.