The invention is a method for managing an application that includes a generic part and an additional part. The generic part is pre-installed on a device. The device gets a fingerprint of itself and after a user authentication sends to a server a request for getting the additional part. The request comprises credentials associated with the user or a reference of the user, the fingerprint and a reference of the application. The server generates a ciphered part of the additional part using a key based on both the credentials and the fingerprint and builds an auto-decrypt program configured to decipher the ciphered part. The device receives the ciphered part and the auto-decrypt program. It gets the fingerprint and the credentials and retrieves the additional part by running the auto-decrypt program with said fingerprint and credentials as input parameters.