Confidentiality protected data transmission method converts security parameters used for protecting transmitted data upon transfer of data between terminals in different security regions

摘要

The data transmission method has the data to be transmitted converted into protected data using security parameters (8a) applicable to a first security region (6), before transmission via a communications connection (4) to a security region transformer (9) for converting the security parameters into security parameters (11a) applicable to a second security region (10), before transfer of the data to the end terminal via a second communications connection.