Online ServiceComputerInterface (OSCI) is a standard with a universal file exchange format tailored to the requirements of e-government. OSCI is used for the legally binding processing of transactions in eGovernment via the Internet, including digital signatures. This requires extensive interoperability of
the content data of the transport and security functions. OSCIis used in Germany for transactions in the public sector, for example for the standardization of the registration system.
Essential for OSCI is the secure and traceable message transmission via the OSCI transport protocol. Based on proven international standards, in particular XMLEncryption for encryption and XML DSig for digital signatures, the message formats were defined in such a way that they meet the requirements of the standards applicable in Germany and Europe.