The security features of the application should be the time of
The security features of the application should be the time of Conceptual design phase.
The requirements identified in the Requirements Analysis Phase are transformed into a System Design Document that accurately describes the design of the system and that can be used as an input to system development in the next phase.
Conceptual Design is an early phase of the design process, in which the broad outlines of function and form of something are articulated. It includes the design of interactions, experiences, processes and strategies. Common artifacts of conceptual design are concept sketches and models.