security with gcj

Hi,
I try to arrange a small application with gcj (binary code generation not 
byte code) under windows and linux operating systems.
I saw under windows that with C# or VB it is possible to "sign" the application.
Tipical commands are "sn" and "al" taking in input some ".snk" files...
Is there any procedure/command to follow also with gcj to sign the executable and verify them?

just as reference in windows the procedure is described in:

http://msdn.microsoft.com/en-us/library/xc31ft41.aspx

Thanks.
x10