This work is based on Prospect theory, which was developed by D. Kahneman and A. Tversky in 1979. This is one the most … field of risk decision-making, especially for firms’ activity in the marketplace. …

have information systems security measure. We consider that the risk is an indicator very important that must be … permanently assess in the usage process of the information system based on ITC. Risk management suppose a permanently evaluation … factors (threat, vulnerability and impact) who affect the information risk and on the other way, diminishing measure of the …