Information management system with authenticity check

摘要

A payment product has a writing area (6c) which is intented for a user's signature. In the writting area there is a first position-coding pattern (5) which makes possible digital recording of the signature. The first position-coding pattern is a subset of a larger second position-coding pattern. The payment product is used in a payment system which is based on electronic payment information, which has been recorded by means of the position-coding pattern, being sent to a server unit, which utilises the position-coding pattern to check that the payment information is valid.