Information Flow Based Security Control Beyond Rbac

Role-based access control (RBAC) is a widely used technology to control information flows as well as control flows within and between applications in compliance with restrictions implied by security p

This Element examines visual perception in the context of activities that involve moving about in complex, dynamic environments. A central theme is that the ability of humans and other animals to perceive their surroundings based on vision is profoundly shaped by the need to adaptively regulate locomotion to variations in the environment. As such, important new insights into what and how we perceive can be gleaned by investigating the connection between vision and the control of locomotion. I present an integrated summary of decades of research on the perception of self-motion and object motion based on optic flow, the perception of spatial layout and affordances, and the control strategies for guiding locomotion based on visual information. I also explore important theoretical issues and debates, including the question of whether visual control relies on internal models.

There are so many roadblocks in Central Africa that it is hard to find a road that does not have one. Based on research in the Democratic Republic of Congo (DRC) and the Central African Republic (CAR), Peer Schouten maps more than a thousand of these roadblocks to show how communities, rebels and state security forces forge resistance and power out of control over these narrow points of passage. Schouten reveals the connections between these roadblocks in Central Africa and global supply chains, tracking the flow of multinational corporations and UN agencies alike through them, to show how they encapsulate a form of power, which thrives under conditions of supply chain capitalism. In doing so, he develops a new lens through which to understand what drives state formation and conflict in the region, offering a radical alternative to explanations that foreground control over minerals, territory or population as key drivers of Central Africa's violent history.

There are so many roadblocks in Central Africa that it is hard to find a road that does not have one. Based on research in the Democratic Republic of Congo (DRC) and the Central African Republic (CAR), Peer Schouten maps more than a thousand of these roadblocks to show how communities, rebels and state security forces forge resistance and power out of control over these narrow points of passage. Schouten reveals the connections between these roadblocks in Central Africa and global supply chains, tracking the flow of multinational corporations and UN agencies alike through them, to show how they encapsulate a form of power, which thrives under conditions of supply chain capitalism. In doing so, he develops a new lens through which to understand what drives state formation and conflict in the region, offering a radical alternative to explanations that foreground control over minerals, territory or population as key drivers of Central Africa's violent history.

Private companies exert considerable control over the flow of information on the internet. Whether users are finding information with a search engine, communicating on a social networking site or accessing the internet through an ISP, access to participation can be blocked, channelled, edited or personalised. Such gatekeepers are powerful forces in facilitating or hindering freedom of expression online. This is problematic for a human rights system which has historically treated human rights as a government responsibility, and this is compounded by the largely light-touch regulatory approach to the internet in the West. Regulating Speech in Cyberspace explores how these gatekeepers operate at the intersection of three fields of study: regulation (more broadly, law), corporate social responsibility and human rights. It proposes an alternative corporate governance model for speech regulation, one that acts as a template for the increasingly common use of non-state-based models of governa

Software is pervasive in our lives. We are accustomed to dealing with the failures of much of that software - restarting an application is a very familiar solution. Such solutions are unacceptable when the software controls our cars, airplanes and medical devices or manages our private information. These applications must run without error. SPARK provides a means, based on mathematical proof, to guarantee that a program has no errors. SPARK is a formally defined programming language and a set of verification tools specifically designed to support the development of software used in high integrity applications. Using SPARK, developers can formally verify properties of their code such as information flow, freedom from runtime errors, functional correctness, security properties and safety properties. Written by two SPARK experts, this is the first introduction to the just-released 2014 version. It will help students and developers alike master the basic concepts for building systems with

Software is pervasive in our lives. We are accustomed to dealing with the failures of much of that software - restarting an application is a very familiar solution. Such solutions are unacceptable when the software controls our cars, airplanes and medical devices or manages our private information. These applications must run without error. SPARK provides a means, based on mathematical proof, to guarantee that a program has no errors. SPARK is a formally defined programming language and a set of verification tools specifically designed to support the development of software used in high integrity applications. Using SPARK, developers can formally verify properties of their code such as information flow, freedom from runtime errors, functional correctness, security properties and safety properties. Written by two SPARK experts, this is the first introduction to the just-released 2014 version. It will help students and developers alike master the basic concepts for building systems with

Private companies exert considerable control over the flow of information on the internet. Whether users are finding information with a search engine, communicating on a social networking site or accessing the internet through an ISP, access to participation can be blocked, channelled, edited or personalised. Such gatekeepers are powerful forces in facilitating or hindering freedom of expression online. This is problematic for a human rights system which has historically treated human rights as a government responsibility, and this is compounded by the largely light-touch regulatory approach to the internet in the West. Regulating Speech in Cyberspace explores how these gatekeepers operate at the intersection of three fields of study: regulation (more broadly, law), corporate social responsibility and human rights. It proposes an alternative corporate governance model for speech regulation, one that acts as a template for the increasingly common use of non-state-based models of governa

Cybersecurity is a leading national problem for which the market may fail to produce a solution. The ultimate source of the problem is that computer owners lack adequate incentives to invest in security because they bear fully the costs of their security precautions but share the benefits with their network partners. In a world of positive transaction costs, individuals often select less than optimal security levels. The problem is compounded because the insecure networks extend far beyond the regulatory jurisdiction of any one nation or even coalition of nations. Originally published in 2006, this book brings together the views of leading law and economics scholars on the nature of the cybersecurity problem and possible solutions to it. Many of these solutions are market based, but they need some help, either from government or industry groups, or both. Indeed, the cybersecurity problem prefigures a host of twenty-first-century problems created by information technology and the global

The so-called "Revolution in Military Affairs," based on the use of information technology to integrate long-range, precision-guided munitions; C4I (command, control, communications, computers, and in