Trust, as we have seen, is a complex thing to model. To quantify it we need to look at a variety of parameters e.g. User behaviours, user provenance and user context. Each of these parameters will modify the trust value. However not all will be used in every setting. We will need different flavours of trust calculation and ways of keeping track of which was used to construct each trust calculation. Designing code to implement a complex model of trustworthiness is going to be a challenge, particularly if we want maintainable code built along proper Object Oriented design principles. Continue reading →