Conference paper

 
Cvrček, D.: Dynamics of Reputation, In: NordSec'04, Helsinki, FI, HUT, 2004, p. 1-7, ISSN 1455-9749
Publication language:english
Original title:Dynamics of Reputation
Title (cs):Dynamika reputace
Pages:1-7
Proceedings:NordSec'04
Conference:NordSec 2004
Series:Publications in Telecommunications Software and Multimedia
Place:Helsinki, FI
Year:2004
Journal:Publications in Telecommunication Software and Multimedia, No. 9, Helsinki, FI
ISSN:1455-9749
Publisher:Helsinki University of Technology
Keywords
Reputation, trust, Dempster-Shafer theory, combining evidence
Annotation
To enforce security without user enrollment, trust (or reputation) systems were proposed to use experience as crucial information to support cooperation as well as for security enforcement mechanisms. However, use of trust introduces very difficult problems that still discourage from exploitation of trust for security mechanisms. The ability to change trust quickly and react effectively to changes in environment and user behaviour is profound for usability of mechanisms built on top of trust. Dempster-Shafer theory was proposed as a suitable theoretical model for trust computation. Here, we define general requirements for reputation dynamics and demonstrate that Dempster-Shafer theory properties are not as good as is widely thought. On the contrary, simple formulae work.
BibTeX:
@INPROCEEDINGS{
   author = {Daniel Cvrček},
   title = {Dynamics of Reputation},
   pages = {1--7},
   booktitle = {NordSec'04},
   series = {Publications in Telecommunications Software and Multimedia},
   journal = {Publications in Telecommunication Software and Multimedia},
   number = {9},
   year = {2004},
   location = {Helsinki, FI},
   publisher = {Helsinki University of Technology},
   ISSN = {1455-9749},
   language = {english},
   url = {http://www.fit.vutbr.cz/research/view_pub.php?id=7556}
}