Maximal Privacy Without Coherence

Privacy lies at the fundament of quantum mechanics. A coherently transmitted quantum state is inherently private. Remarkably, coherent quantum communication is not a prerequisite for privacy: there are quantum channels that are too noisy to transmit any quantum information reliably that can nevertheless send private classical information. Here, we ask how much private classical information a channel can transmit if it has little quantum capacity. We present a class of channels N_d with input dimension d^2, quantum capacity Q(N_d) <= 1, and private capacity P(N_d) = log d. These channels asymptotically saturate an interesting inequality P(N) <= (log d_A + Q(N))/2 for any channel N with input dimension d_A, and capture the essence of privacy stripped of the confounding influence of coherence.Comment: 6 pages. Proof of Eq.(13) slightly revise

Privacy as a Human Right

The right to privacy seems to occupy an entirely natural place within the structure of human rights; for many years now there has been an established jurisprudence on the right to privacy coming from the European Court of Human Rights in Strasbourg. At the same time, there have been fundamental conceptual (Thomson, Geuss) and normative (McKinnon) criticisms of the right to privacy. Against these critics, I argue, first, that it is possible to articulate a systematic normative conception of privacy, which explains and supports a general right to privacy; and second, that the right to privacy lies at the very heart of a human right to freedom and autonomy. Without reference to a right to privacy, many other rights to freedom are not realizable. I first develop a normative conception of privacy and its different dimensions, and in a second step take a closer look at the jurisprudence of the ECHR by considering some examples, in order to understand what role the right to privacy plays in the Court's decisions. The right to privacy, far from being reducible to other rights or detrimental to the rights and needs of women, occupies a central place on the list of human rights

The Good, the Bad and the Press

Review of: Suing the Press. By Rodney A. Smolla. Oxford University Press, New York, N.Y., 1986

Implanting Life-Cycle Privacy Policies in a Context Database

Ambient intelligence (AmI) environments continuously monitor surrounding individuals' context (e.g., location, activity, etc.) to make existing applications smarter, i.e., make decision without requiring user interaction. Such AmI smartness ability is tightly coupled to quantity and quality of the available (past and present) context. However, context is often linked to an individual (e.g., location of a given person) and as such falls under privacy directives. The goal of this paper is to enable the difficult wedding of privacy (automatically fulfilling users' privacy whishes) and smartness in the AmI. interestingly, privacy requirements in the AmI are different from traditional environments, where systems usually manage durable data (e.g., medical or banking information), collected and updated trustfully either by the donor herself, her doctor, or an employee of her bank. Therefore, proper information disclosure to third parties constitutes a major privacy concern in the traditional studies

Blogging: self presentation and privacy

Blogs are permeating most niches of social life, and addressing a wide range of topics from scholarly and political issues1 to family and children’s daily lives. By their very nature, blogs raise a number of privacy issues as they are easy to produce and disseminate, resulting in large amounts of sometimes personal information being broadcast across the Internet in a persistent and cumulative manner. This article reports the preliminary findings of an online survey of bloggers from around the world. The survey explored bloggers’ subjective sense of privacy by examining their blogging practices and their expectations of privacy when publishing online. The findings suggest that blogging offers individuals a unique opportunity to work on their self-identity via the degree of self-expression and social interaction that is available in this medium. This finding helps to explain why bloggers consciously bring the ‘private’ to the public realm, despite the inherent privacy risks they face in doing so

Regulation and the New Economy

The fundamental theorem of welfare economics asserts that under conditions of perfect competition Pareto efficiency will obtain. This has provided the conceptual basis for the market failure approach to regulation, which focuses on failure to satisfy the conditions for perfect competition as potentially justifying government intervention in markets. The approach is evaluated in the context of a number of key characteristics of the industries of the New Economy. Three areas of regulatory focus are examined: policy approaches relating to competition, intellectual property, and information privacy. It is apparent that the applicability of the market failure approach is open to question, particularly in regard to competition policy. The exploitation by dominant market players of what may be termed "natural" barriers to entry resulting from some of the characteristic features of the New Economy (scale and scope economies, network effects and consumer lock-in) should be judged in the light of Schumpeterian competition rather than that of neoclassical perfect competition. The difficulty facing regulatory authorities is how to differentiate between situations requiring intervention and those that do not. The discussion of intellectual property highlights the fact that, in general, government intervention is not necessarily the only or even the best solution to instances of market failure. Finally, the case of information privacy illustrates how the spillover effects of regulatory actions in one jurisdiction can impact on other jurisdictions and necessitate coordination in a globalised economy. The need for countries to cooperate and coordinate their policies is perhaps the key conclusion of the analysis.New Economy, regulation, government intervention