Software is required to comply with the laws and standards of software security. However, stakeholders with less concern regarding security can neither de- scribe the behaviour of the system with regard to secu- rity nor validate the system's behaviour when the secu- rity function conflicts with usability. Scenarios or use- case specifications are common in requirements elici- tation and are useful to analyse the usability of the system from a behavioural point of view. In this paper, the authors propose a method to weave scenario frag- ments based on security evaluation criteria into sce- narios. The experiments showed that the weaving method led to a better scenario than the method in- volving writing or modifying the scenario with refer- ence to security evaluation criteria. Keywords: requirements elicitation, security require- ments, scenario analysis, aspect-oriented software de- velopment