Computational Vulnerability Analysis for Information Survivability

The Infrastructure of modern society is controlled by soft-ware systems. These systems are vulnerable to attacks; sev-eral such attacks, launched by ”recreation hackers ” have al-ready led to severe disruption. However, a concerted and planned attack whose goal is to reap harm could lead to catas-trophic results (for example, by disabling the computers that control the electrical power grid for a sustained period of time). The survivability of such information systems in the face of attacks is therefore an area of extreme importance to society. This paper is set in the context of self-adaptive survivable sys-tems: software that judges the trustworthiness of the compu-tational resources in its environment and which chooses how to achieve its goals in light of this trust model. Each self