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Obligations of trust for privacy and confidentiality in distributed transactions

By UM Mbanaso, GS Cooper, DM Chadwick and A Anderson

Abstract

Purpose – This paper aims to describe a bilateral symmetric approach to authorization, privacy protection and obligation enforcement in distributed transactions. The authors introduce the concept of the obligation of trust (OoT) protocol as a privacy assurance and authorization mechanism that is built upon the XACML standard. The OoT allows two communicating parties to dynamically exchange their privacy and authorization requirements and capabilities, which the authors term a notification of obligation (NoB), as well as their commitments to fulfilling each other's requirements, which the authors term signed acceptance of obligations (SAO). The authors seek to describe some applicability of these concepts and to show how they can be integrated into distributed authorization systems for stricter privacy and confidentiality control. \ud Design/methodology/approach – Existing access control and privacy protection systems are typically unilateral and provider-centric, in that the enterprise service provider assigns the access rights, makes the access control decisions, and determines the privacy policy. There is no negotiation between the client and the service provider about which access control or privacy policy to use. The authors adopt a symmetric, more user-centric approach to privacy protection and authorization, which treats the client and service provider as peers, in which both can stipulate their requirements and capabilities, and hence negotiate terms which are equally acceptable to both parties. \ud Findings – The authors demonstrate how the obligation of trust protocol can be used in a number of different scenarios to improve upon the mechanisms that are currently available today. \ud Practical implications – This approach will serve to increase trust in distributed transactions since each communicating party receives a difficult to repudiate digitally signed acceptance of obligations, in a standard language (XACML), which can be automatically enforced by their respective computing machinery. \ud Originality/value – The paper adds to current research in trust negotiation, privacy protection and authorization by combining all three together into one set of standardized protocols. Furthermore, by providing hard to repudiate signed acceptance of obligations messages, this strengthens the legal case of the injured party should a dispute arise

Topics: QA75, other
Publisher: Emerald Group Publishing Limited
OAI identifier: oai:usir.salford.ac.uk:1927

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Citations

  1. (2004). A trust negotiation system for digital library Web services", doi
  2. (2005). Adaptive Trust Negotiation and Access Control”, doi
  3. (2005). eXtensible Access Control Markup Language (XACML)
  4. (2004). Federated Security: The Shibboleth Approach”,
  5. (2008). Guidelines For The Issuance And Management Of Extended Validation Certificates”, available at http://www.cabforum.org/documents.html (accessed 22nd
  6. (2006). Liberty ID-WSF Web Services Framework Overview Version: 2.0”, available at http://www.projectliberty.org/liberty/specifications__1 (accessed 24
  7. (2006). Privacy Negotiation and Implications on Implementations”, Proc. W3C Workshop on Languages for Privacy Policy Negotiation and Semantics-Driven Enforcement, available at http://www.w3.org/2006/07/privacy-ws/papers/ (accessed 24
  8. (2002). Protecting sensitive attributes in automated trust negotiation”,
  9. (2006). Schema for Obligation of Trust (OoT)”, available at http://infosec.salford.ac.uk/names/oot/ootSchema/ (accessed 22nd
  10. (2005). Security Assertion Markup Language (SAML) V2.0”, March, available at http://saml.xml.org/saml-specifications (accessed 24
  11. (2004). Trust Negotiations: Concepts, Systems and Languages”,
  12. (2008). W3C (2002b) “The Platform for Privacy Preferences 1.0 (P3P1.0) Specification” available at http://www.w3.org/TR/P3P/ (accessed 24
  13. (2007). Web Services Profile of XACML (WS-XACML) Version 1.0”, Working Draft 10,
  14. (2008). Web Services Security: SOAP Message Security 1.1 (WS-Security 2004), OASIS Standard Specification", available at http://www.oasisopen.org/committees/download.php/16790/wss-v1.1-spec-os-SOAPMessageSecurity.pdf (accessed 24
  15. (2003). X-TNL: An XML-based Language for Trust Negotiations”.

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