Resolving vulnerability identification errors using security requirements on business process models

摘要

Purpose - In any information security risk assessment, vulnerabilities are usually identified by information-gathering techniques. However, vulnerability identification errors - wrongly identified or unidentified vulnerabilities - can occur as uncertain data are used. Furthermore, businesses' security needs are not considered sufficiently. Hence, security functions may not protect business assets sufficiently and cost-effectively. This paper aims to resolve vulnerability errors by analysing the security requirements of information assets in business process models. Design/methodology/approach - Business process models have been selected for use, because there is a close relationship between business process objectives and risks. Security functions are evaluated in terms of the information flow of business processes regarding their security requirements. The claim that vulnerability errors can be resolved was validated by comparing the results of a current risk assessment approach with the proposed approach. The comparison is conducted both at three entities of an insurance company, as well as through a controlled experiment within a survey among security professionals. Findings - Vulnerability identification errors can be resolved by explicitly evaluating security requirements in the course of business; this is not considered in current assessment methods. Originality/value - It is shown that vulnerability identification errors occur in practice. With the explicit evaluation of security requirements, identification errors can be resolved. Risk assessment methods should consider the explicit evaluation of security requirements.