Method and arrangement for different production of a cryptographic security of a message in a host device

摘要

Method and arrangement for different production of cryptographic fuses of messages in a host device, wherein for the cryptographic securing a message for a first purpose a first signature for the cryptographic securing a message for a second purpose a second signature is used, wherein the signatures differ in the nature of their production. A cryptographic methods logic (20) has a number of logic circuits (21, 22, 23) and a changeover switch (24, 26) and is externally from the postal security device (10) and at least arranged with its output (d) with a data input comprises (i) of the postal security device (10), which is connected a logic circuit (12) having a digital signature algorithm on the from the output (d) supplied by the output signal, in order to generate data for a signature.