VERIFICATION OF A DATA LINK

摘要

Communication system comprising a first communication unit and at least a second communication unit, wherein the first communication unit and the at least second communication unit are in communication with one another and are suitable for exchanging signals, wherein the signals comprise text messages and wherein the second communication unit sends a reply message as a response to a first text message sent from the first communication unit to the second communication unit, wherein the reply message from the second communication unit contains a sub-block for authenticity data, from the content of which the first communication unit, after receipt of the reply message, is able to establish whether the reply message is authentic.