A method for key distribution between a server (1) and a medical device (3A, 3B), in particular an infusion device, comprises: providing, at the server (1), a security key (4A, 4B) to be used for a secure data communication of the medical device (3A, 3B); establishing a first communication link (11) between the server (1) and a computing device (2); establishing a second communication link (30A, 30B) between the computing device (2) and the medical device (3A, 3B); retrieving, by the computing device (2), the security key (4A, 4B) from the server (1) via the first communication link (11); and transmitting, by the computing device (2), the retrieved security key (4A, 4B) to the medical device (3A, 3B) via the second communication link (30A, 30B). In this way a method for the security key distribution between a server and a medical device is provided, the method being suitable even for medical devices having low computational and memory capabilities.