Abstract: Reputation-based trust attributes provided by network devices can be used by a truster device to gauge the trust-worthiness of a trustee device. The reputation-based attributes gathered from network devices may indicate a level of trust between those network devices and a trustee device. The truster device may then use those reputation-based attributes to determine a trust level between the truster device and the trustee device without relying on a dedicated authenticator, such as an authorization, authentication, and accounting (AAA) server. The truster device may permit the trustee device to access (or provide) a service when the determined trust level exceeds a threshold associated with that service. Reputation-based attributes may be exchanged between peers of a federated network or federated trust domain. Reputation-based attributes may also be exchanged between brokers in different federated networks/trust-domains.