Professor Andrew Odlyzko
, University of Minnesota, US. "The Unsolvable Privacy Problem and its Implications for Security Technologies"
Professor Chris Mitchell
, Royal Holloway, UK. "A Taxonomy of Single Sign-On Systems"
Prof. Yvo Desmedt
, Florida State University ,Talahasee, USA. "On-Line Revocation and PKI"
Professor Gerard Milburn
, University of Queensland, Australia. "The challenge of quantum computers"Privacy presents many puzzles. In particular, why is it eroding, given the high value people assign to their privacy? This extended abstract argues that there are strong incentives for decreasing privacy, rooted in the economic benefits of price discrimination. As a result, the privacy problem is unsolvable. The conflict between incentives to price discriminate and the public dislike of this practice will influence what security technologies are likely to succeed.
At present, network users have to manage one set of authentication credentials (usually a username/password pair) for every service with which they are registered. Single Sign-On (SSO) has been proposed as a solution to the usability, security and management implications of this situation. Under SSO, users authenticate themselves only once and are logged into the services they subsequently use without further manual interaction. Several architectures for SSO have been developed, each with different properties and underlying infrastructures. This paper presents a taxonomy of these approaches and puts some of the SSO schemes, services and products into that context. This enables decisions about the design and selection of future approaches to SSO to be made within a more structured context; it also reveals some important differences in the security properties that can be provided by various approaches.