Access control (AC) refers to mechanisms and policies that restrict access to resources, thus
regulating access to physical or virtual resources of an information system. AC approaches …

By combining multiple factors during authentication, a service can provide better assurance
of security. However, the users are likely to feel inconvenient, or even discard the service …

In this paper we present a Risk Management System. The goal of the RMS is to decrease
risks related to information access. The goal is met by taking the context of operations into …