• Oxford English Dictionary
• Wikipedia-DE
• Wikipedia-DE (Economy-Definition)
• Computer Security
• Cryptograph
• Trust and Willingness by Uwe Roth

• Sociology
• Psychology
• Philosophy

Reference

• Norton Deutsch
• Niklas Luhmann
• Bernard Barber
• Diego Gambetta
• Barbara Misztal

Reference

• Trust and Cooperation
• Trust and Recommendation
• Trust and Commodity
• Trust and Game Theory

Reference

Two types of trust

• Direct Trust:
  Trusting the other entitiy directly
• Recommendation Trust:
  Trusting the other entity based on a recommendation of a third party

References

Time Dependency

• only in future decisions
• in past and future decisions

Uniformity of Trust-Relation

• uniform: if "a" builds a trust-relation towards "b" regarding a trust-class "x", "b" may build a trust-relation towards "a" regarding a trust-class "x"
• non-uniform: if "a" builds a trust-relation towards "b" regarding a trust-class "x", "b" never builds a trust-relation towards "a" regarding a trust-class "x"

Exclusivity of Trust-Relation

• towards one
• towards a group

Representation of Trust

• binary value: [yes, no], [0,1]
• discrete values: [-1, 0, 1, 2, ..4]
• continous values: [0..1] [-1..+1] [0..+∞] [-∞..+∞]
• tuple of values [[0..1], [0..1], [0..1]]
• complex struct

Kind of Trust-Decision

• yes/no-decision if trust is enough or not
• best-of-decision, if one with the best trust is required

Comparability of Trust

• Comparable: a>b, a=2*b, (a>b and b>c) -> a>c
• Incomparable

Hierarchy of Trust

• Every Trust-Relation has the same priority
• There may be hierarchies of trust, meaning, a trust information of a higher entity worth more than an information of a lower entity