Merging and Extending the PGP and PEM Trust Models - the ICE-TEL Trust Model

The ICE-TEL project is a pan-European project that is building an Internet X.509 based certification infrastructure throughout Europe, plus several secure applications that will use it. This paper describes the trust model that is being implemented by the project. A trust model specifies the means by which a user may build trust in the assertion that a remote user is really who he purports to be (authentication) and that he does in fact have a right to access the service or information that he is requesting (authorization). The ICE-TEL trust model is based on a merging of and extensions to the existing Pretty Good Privacy (PGP) web of trust and Privacy Enhanced Mail (PEM) hierarchy of trust models, and is called a web of hierarchies trust model. The web of hierarchies model has significant advantages over both of the previous models, and these are highlighted here. The paper further describes the way that the trust model is enforced through some of the new extensions in the X.509 V3 certificates, and gives examples of its use in different scenarios

En praktisk och enkel checklista för Internet-of-Things, v1.0

Godkänd; 2015; 20151208 (jlm)</p

En praktisk och enkel checklista för Internet-of-Things, v1.0

Godkänd; 2015; 20151208 (jlm)</p

Trust Models in ICE-TEL

Public key certification provides mechanisms that can be used to build truly scaleable security services, such as allowing people who have never met to have assurance of each other's identity. Authentication involves syntactic verification of a certificate chain followed by a semantic look at the policies under which the certificates were issued. This results in a level of assurance that the identity of the person to be authenticated is an accurate description of the person involved, and requires verifiers to specify who they trust and what they trust them to do. Two widely discussed mechanisms for specifying this trust, the PEM and PGP trust models, approach the problem from fundamentally different directions. The EC funded ICE-TEL project, which is deploying a security infrastructure and application set for the European research community, has described a new trust model that attempts to be equally applicable to organisation-centric PEM users and user-centric PGP users