A device (200; 300) comprising a first application unit (401) and a second application unit (402) provided in a first portion (202) of the device (200; 300), and a transfer unit (211) provided in a second portion (212; 302) of the device (200; 300), wherein the transfer unit (211) is adapted to transmit a message between the first application unit (401) and the second application unit (402), and wherein a higher level of security is provided in the first portion (202) than in the second portion (212; 302) and/or wherein the transfer unit (211) is adapted to take the role of a communication master when transmitting the message between the first application unit (401) and the second application unit (402).