A method and a system for performing a transaction between at least one first
party
and at least one second party are disclosed. A data network connects data input/output
terminals of the parties. In the data network, a secure and trusted transaction
server is provided, in which a profile of the parties is registered, having a party
identifier identifying a particular party, and authentication data for authenticating
the party and data sent by the party. The parties communicate with each other through
the transaction server by means of various transaction messages, which are digitally
signed using a table of random numbers and a hashing operation, wherein the table
of random numbers is generated by reading a token.
