Simple Trust Network Demo

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Four entities, labelled A, B, C and D have trust opinios about each other. Each directional trust relationship (from left to right) between two entities is represented as a point inside the triangle on the path between them. Entity A receives recommendations from B and C about the trustworthiness of D. Furthermore, A has trust opinions about B and C. This enables entity A to derive her own opinion (bottom triangle) about D.

Left-click and drag opinion points to set opinion values. The demo shows how this simple trust network can be analysed using Subjective logic Operators to derive A's opinion about D, as shown by the bottom opinion triangle. In detail, trust transitivity means that entity A discounts B's opinion about D by A's own opinion about B, and similarly for C. Finally, A merges the two discounted opinions using the fusion operator, producing the derived opinion about D. Right-click on the opinion triangles to see the exact values of each opinion. See also various visualisations of opinion values and draft book for details about theory.


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Applet design by Simon Pope and Matthew Davey.

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Last updated: 24 March 2011.