@MASTERSTHESIS\{IMM2005-04065, author = "J. Krogh", title = "Trust in open grid systems", year = "2005", keywords = "Security, Encryption, Certi cate, Trust, Evidence, Public Key Infrastructure.", school = "Informatics and Mathematical Modelling, Technical University of Denmark, {DTU}", address = "Richard Petersens Plads, Building 321, {DK-}2800 Kgs. Lyngby", type = "", note = "Supervised by Assoc. Prof. Christian D. Jensen", url = "http://www2.compute.dtu.dk/pubdb/pubs/4065-full.html", abstract = "The existing security infrastructures enables secure collaboration in systems where it is acceptable to have a single or few central authorities. In a distributed system with many independent collaborators like the internet this approach is not feasible. This M.Sc. Thesis has focus on modelling a security infrastructure with features similar to the human notion of trust within a distributed computing network. A system that handles the evidence and recommendation evaluation on top of a public key infrastructure that enables an open and collaborative system with the subject in focus. This report descibes the design and implementation of such system." }