Table 1.

Trust and validity values.

Parameter	Level	When does it happen?
Trust	0	(i) There has been a greeting process between users, but the one in the network does not trust him (ii) The user has reduced the level of confidence to the other one
	1	(i) It has been a greeting process between user and the one in the network that trusts him (ii) The user has increased the level of confidence to the other one
Validity	0	(i) It is not obtained from the greeting process with that user (ii) The validity has not been obtained through a trusted node
	1	(i) It has been obtained directly from the greeting process with that user (ii) It has been obtained through a trusted node