An empirical evaluation of geometric subjective logic operators

Federico Cerutti, Alice Toniolo, Nir Oren, Timothy J. Norman

Research output: Chapter in Book/Report/Conference proceedingPublished conference contribution

2 Citations (Scopus)


Computational trust mechanisms aim to produce a trust rating from both direct and indirect information about agents behaviour. Jøsang's Subjective Logic has been widely adopted as the core of such systems via its fusion and discount operators. Recently we proposed an operator for discounting opinions based on geometrical properties, and, continuing this line of investigation, this paper describes a new geometry based fusion operator. We evaluate this fusion operator together with our geometric discount operator in the context of a trust system, and show that our operators outperform those originally described by Jøsang. A core advantage of our work is that these operators can be used without modifying the remainder of the trust and reputation system.

Original languageEnglish
Title of host publicationAgreement Technologies
Subtitle of host publicationSecond International Conference, AT 2013, Proceedings
EditorsCarlos Iván Chesñevar, Eva Onaindia, Sascha Ossowski, George Vouros
PublisherSpringer Verlag
Number of pages15
Volume8068 LNAI
ISBN (Electronic)9783642398605
ISBN (Print)9783642398599
Publication statusPublished - 2013
Event2nd International Conference on Agreement Technologies, AT 2013 - Beijing, China
Duration: 1 Aug 20132 Aug 2013

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349


Conference2nd International Conference on Agreement Technologies, AT 2013

Bibliographical note

The authors thank the anonymous reviewers for their helpfulcomments.
Research was sponsored by US Army Research laboratory and the UK Ministry of Defence and was accomplished under Agreement Number W911NF-06-3-0001. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of the US Army Research Laboratory, the U.S. Government, the UK Ministry of Defense, or the UK Government. The US and UK Governments are authorized to reproduce and distribute reprints for Government purposes notwithstanding any copyright notation hereon.


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