| 摘要 |
The invention relates to a method for providing letters and parcels with postal remarks. A client system loads a fee amount from a value transmission centre through a data line, said client system controlling the printing of postal remarks on letters and parcels and said value transmission centre transmitting a data packet to the client system. According to the invention, the method is characterised in that the value transmission centre generates a code and transmits the code to the client system, in that data that are generated in the client system can be encoded with said code in such a way that the value transmission centre can decode them, in that the data are sent from the client system to the value transmission centre and in that the value transmission centre decodes these data, in that the value transmission system forms a random number and then replaces the data, together with the random number, encodes them with a code that is unknown to the client system and with a code that is known to the security module of the client system and then transmits these encoded data to the client system. The invention also relate to a client system for franking letters and parcels and to a value transmission system for using in a franking method.
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