How do we define trust?

What are the key elements of any definition of trust? Also, why talk about it? Why should we as information professionals take an interest (or not take an interest) in discussing trust in information?

Here is an article discussing how trust may be defined:

Grandison, T., and Sloman, M. 2001. A Survey of Trust in Internet Applications. IEEE Communications Surveys and Tutorials.

How do we measure trust?

How can a person’s trust in information best be measured?

Here is an article to help guide discussion:

Manchala D. W. Trust metrics, models and protocols for electronic commerce transactions, in 18th International Conference on Distributed Computing Systems, IEEE, 1998.

e-commerce and data mining

Should online retailers or search engines be deterred from mining usage data from their websites, or from monitoring trends in how Internet users are using the Internet as a whole? Are there benefits to allowing an online retailers or search engine to mine data? If so, how far should these sites be allowed to go in terms of collecting personal data? When should they be required to stop?

Here are some articles relating to this discussion:

Government surveillance

Is it acceptable for a government to monitor channels of digital information, including personal information, that pass within its borders? If a government has a legitimate interest in doing so, how may it build trust among its citizens that it is not unnecessarily monitoring their communications or collecting their personal information? When should a government have its powers in this regard limited?

Government censorship

Should a government be allowed to (try to) censor information that its citizens receive? Are there circumstances under which this practice should be considered explicitly acceptable or explicitly unacceptable?