A method and system for a source participant assessing trustworthiness of a destination participant through one or more neighboring participants in a collaborative environment. The method comprises modeling all of the participants as network nodes and relationships between the participants as network paths and identifying a set of the network nodes and the network paths representing the neighboring participants that connects the network node of the source participant to the network node of the destination participant. Each of the network nodes of the neighboring participants as identified has a trust rating with best result, the trust rating is a relative measurement of feedback ratings. The trust rating of a first one of the network nodes of the neighboring participants as identified is computed with the feedback ratings between the first one of the network nodes and others of the network nodes directly connected to the first one of the network nodes. In addition, the trust rating between the first one and a second one of the network nodes is the relative measurement of the feedback ratings of the first one provided for the second one of the network nodes in comparison to the feedback ratings of the first one provided to others of the network nodes, the second one and the others of the network nodes are directly connected to the first one of the network nodes.