METHOD AND SYSTEM FOR PERFORMING A TRANSACTION BETWEEN A CLIENT AND A SERVER OVER A NETWORK

摘要

Method and system for performing a transaction between a first client (4) and a server (6) over a network (2), including the steps of providing a first signed record by digitally signing a record by the first client (4), the record comprising information to be accepted by the first client (4). Furthermore, a second signed record is provided by digitally signing the record by the server (6), which is sent to the first client (4). The information is stored both by the server (6) and the first client (4), thereby providing proof of the transaction. Furthermore, the server (6) may sign for one or more parties (4, 26) by proxy, based on a certificate. Also, the method and system may be used to provide fair exchange of signatures of the parties (4, 26) involved, by using escrows of the signatures required.