Classifications
According to Solhaug et al. [42], trust management is a
special case of risk management with a particular emphasis
on authentication of entities under uncertainty and decision
making on cooperation with unknown entities. However, the
application of trust management has been extended from
authentication to various aspects of communications and
networking, including secure routing for isolating malicious
or selfish nodes, intrusion detection, key management, access
control, and other decision making mechanisms. Trust
management includes trust establishment (i.e., collection of
appropriate trust evidence, trust generation, trust distribution,
trust discovery, and evaluation of trust evidence), trust update,
and trust revocation [50] [42]. This section surveys popularly
used classifications of trust management (or establishment).