Communicating sequential processes
Communicating sequential processes
Specification styles in distributed systems design and verification
TAPSOFT '89 2nd international joint conference on Theory and practice of software development
CHI '04 Extended Abstracts on Human Factors in Computing Systems
Digital backchannels in shared physical spaces: attention, intention and contention
CSCW '04 Proceedings of the 2004 ACM conference on Computer supported cooperative work
Formal Analysis of Human-computer Interaction using Model-checking
SEFM '05 Proceedings of the Third IEEE International Conference on Software Engineering and Formal Methods
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This paper describes a model-checking based methodology to detect systematic errors commonly made by non-expert users. The human and computer components of the systems are modelled separately. The human component consists of a general model of the user's cognitively plausible behaviour, which can be then refined into specific instances of behaviour that reflect relevant aspects of users' personalities and skills. We consider, as a case study, a formal model of an online interactive tool that enables conference attendees to share thoughts and reactions and select matching attendees to start communication with. Starting from the initial system design, a model-checking technique is used to highlight system vulnerabilities that arise from interactions with non-expert users and may lead to security violations. The results of the analysis are exploited to improve the design by introducing safeguards that reduce or even prevent security violations.