If you stay within FileMaker Go, it is the Draco Engine and then with a SSL certificate you will have encrypted traffic from FileMaker Server to the client FileMaker Go.
What kind of information/documentation do you need? Framework?
What kind of development framework does Filemaker uses
None. FileMaker is its own 'framework'. The FileMaker product line is the platform on which solutions are built.
If the question comes from the perspective of where possible answers are: .NET, JRE, ... then it is not a relevant question.
in addition to the previous replies:
You can get the security documentation for FileMaker solutions that are created by FileMaker Pro, hosted on FileMaker Server and/or Opened on FileMaker Go.