The invention relates to a complex coacervation process based on the use of type B gelatin as polycationic colloid, for the preparation of \u201cHalal\u201d certified flavor-containing microcapsules. The method includes displaying various lock images, where at least one of the parts is altered, when an attempt is made to unlock the mobile device, determining whether a lock image, detected according to a user input, matches a preset image, and unlocking the mobile device according to the result of matching between the detected lock image and the preset image. The high frequency apparatus has a simple structure and a reduced transmission loss and capable of being made by a simple manufacturing process. Thus, an end user can access content associated with their home multimedia processing device using a host multimedia processing device located at a neighbor’s house or other host location. The cryptographic key and the biometric electronic template are stored in the memory.