Abstract
Implementing security and privacy requirements at every level of the software development cycle is imperative for ensuring optimum usability as well as the users' satisfaction. Software development must consider and comply effectively with the risks involved in the privacy and protection of confidential data. This research study endeavors to integrate the standards of data protection along with the Security Threat Oriented Requirements Engineering (STORE) methodology in order to recognize the potential threats to privacy requirements. The proposed extension of the STORE methodology, called the P-STORE, is validated by a case study of the Healthcare Management Software (HMS) system project. Furthermore, we have used the integrated fuzzy AHP with fuzzy TOPSIS technique for the usability assessment of different privacy requirements engineering approaches including the P-STORE methodology. The study demonstrates that the P-STORE approach has the capability to elicit more efficient privacy requirements and that it allows the software engineer to arrange privacy requirements efficaciously.