Device for securing a client application for a symbology display system of the client-server type

A device for securing a client application for a symbology display system of the client-server type, said client application using instantaneous values of measured properties (GM) to generate a command (C) to modify a graphic object intended to be interpreted by a server application of said display system, said graphic object corresponding to a symbol to be displayed in the form of an image on a graphic device of said display system, wherein, said client application including:

• an acquisition and processing module using instantaneous values of measured properties (GM) as inputs to generate instantaneous values of properties of interest (GI);
• a lookup table associating each dynamic variable (VD) of a set of dynamic variables of each of the objects maintained by the server application with a property of interest (GI), said lookup table assigning the instantaneous value of the corresponding property of interest (GI) as the instantaneous value of a dynamic variable (VD);
• and
• a module for generating commands issuing a command (C) to the server application, the device includes:
• dedicated means for securing the operation of said acquisition and processing module;
• dedicated means for securing said lookup table;
• and
• dedicated means for securing the operation of said command generating module.

A method for securely generating commands (C), implemented in a symbology display system of the client-server type, wherein it includes the following steps:

• according to a primary chain:
• acquiring and processing instantaneous values of measured properties (GM) to generate instantaneous values of properties interest (GI);
• matching each dynamic variable (VD) from a set of dynamic variables of the graphic object maintained by a server application of said symbology display system, with a property of interest (GI), and assigning said instantaneous value of the corresponding property of interest (GI) as the instantaneous value of the dynamic variable (VD);
• and
• generating a command (C) to update a symbology associated with the graphic object, during the modification of the instantaneous value of a dynamic variable of said object;
• and according to a securing chain:
• securing the acquiring and processing step;
• securing the matching step;
• and
• securing the step consisting of generating a graphic command.