Improved installation of a terminal in a secure system

A method for use in a system (300) comprising a terminal (100) and a server (340), said method being for installing the terminal (100) in the system (300), the method comprising:

• the server (340) identifying the terminal (100);
• the server (340) generating key generation data, comprising at least one data seed;
• the server (340) distributing the at least one data seed to the terminal (100);
• the server (340) generating key data, to be used for generating a symmetric encryption key, and meta data, to be used for generating an authentication token, based on said at least one data seed and a function, such as a cryptographic hash function;
• the server (340) storing an identifier for the terminal (100) along with the key data and the meta data for the terminal (100),
• the terminal (100) receiving the at least one data seed from the server (340);
• the terminal (100) generating key data and meta data based on said at least one data seed and the same function;
• the terminal (100) storing the key data and the meta data, wherein the key data and the meta data stored in the terminal (100) are the same as the key data and the meta data stored in the server (340).