1. TISPAN work on METHODS
Security methods

2. Core approach to security in TISPAN
Assurance tested security for evaluation
Adaptation of ISO/IEC to assist developers in making standards that can be used as part of evaluation process
Risk based security analysis
Main method is TVRA defined in TS

3. Structure proposed in 2006

4. Document structure in NGN

5. Updates to be reflected in MBS
Updates to the TVRA method
Addition of steps
Addition of Cost Benefit Analysis
Table and database structuring
Monte-Carlo analysis development
Refinement of requirements capture method